What the instruments are, how a consultation runs from the client's whispered question to the prescribed offering, and which decisions belong to the diviner and which do not.
A consultation has a fixed shape. The client puts his question to the instruments without the diviner hearing it, the diviner casts to produce one of the 256 signatures, the diviner recites the verses filed under that signature until the client stops him at the relevant one, the diviner interprets it and states the offering the verse prescribes, and follow-up questions are resolved by paired casts compared for seniority. The client then performs the offering, delays it, or refuses.
This file describes that sequence as the scholarship documents it. It is a description of a practice, not a set of instructions, and it deliberately omits the invocations, the ritual formulae, and the initiate-held material that make an actual consultation what it is. Where the published record stops, this file says so.
The ikin are the primary instruments and the most important object in Ifá. In the tradition's own account they are not a tool Ọ̀rúnmìlà uses but what he left in his place: when he returned finally to ọ̀run, "he replaced himself here on earth with the sixteen sacred palmnuts" This is why offerings in Ifá worship are presented to the ikin kept in their bowl .
They are a specific kind of nut, from a palm designated ọ̀pẹ Ifá (Ifá palm-tree), and each has four eyelets on its thick bottom edge . Abimbola records the belief that a single such nut mixed into palm oil production makes the mixture foam excessively and spoil the grade, which is why palm oil producers will not cut fruit from a tree bearing them .
A chain, metal or cotton cord, with eight half seed shells attached, four to each side of a bare middle section by which it is held . The shells come from the ọ̀pẹ̀lẹ̀ tree; shaped metal is sometimes substituted . Each half shell has a rough inner surface and a smooth outer one .
The diviner holds it at the middle and throws it away from himself, onto a mat or a straw tray, so that four shells fall in a line on each side . One throw yields all eight positions.
The comparison with ikin is stated plainly by both major sources. Abimbola: the ọ̀pẹ̀lẹ̀ "is easier to manipulate than the sacred palmnuts," requiring only that the diviner "cast the chain on the ground and quickly read the signature of the Odù presented thereby," and it is used more often "because it is easier to manipulate and also easier to carry about" Bascom: one cast of the chain selects a figure where the nuts require eight separate manipulations .
The division of use is by occasion rather than by rule. Abimbola: the diviner uses the chain "for most of the private divinations involving individual clients" while reserving the palm nuts "for more important occasions of public or ritualistic interest," though "nothing stops him from using either of these two instruments for public or private divination"
How the reading differs. It does not, informationally. Bascom is explicit: divination with the chain, "though regarded as inferior, is more rapid and permits the asking of questions through specific alternatives, but otherwise the two systems are identical. They employ the same set of figures with the same names and rank order, and the same verses" The chain produces the same 256 addresses and retrieves the same corpus.
What differs is status, speed, and the physical trace. The chain is regarded as inferior . The nuts leave marks in powder on a tray, which makes the figure visible and durable through the consultation; the chain shows the figure only while it lies where it fell. And the speed difference is what makes the paired-cast question procedure practical, since that procedure requires many casts.
A carved wooden tray, flat, of varying shape and size, with a raised carved border . It holds the iyèròsùn in which the marks are made .
The border carries imagery, and the imagery is oriented. The section directly opposite the diviner is the ojú ọpọ́n, the face of the tray, and a head of Èṣù is characteristically carved there . Yorùbá trays generally carry at least one face on the border along with geometric motifs, figural or animal representations, or a combination . The Drewals' analysis distinguishes serial from seriated arrangements of the border images .
The tray's perimeter is named by quadrant: ojú ọpọ́n (face), ẹsẹ̀ ọpọ́n (feet of the tray), ọ̀nà kanran and ọ̀nà mùrún (paths), oriented respectively east, west, south and north with the diviner facing east and the feet of the tray nearest him . Confidence on the cardinal correspondences: medium, since I have them from a survey source rather than from the primary ethnographies.
The tray matters for the binary structure because it establishes orientation. As file 02 sets out, right column and left column are not interchangeable, and Bascom notes it is essential to differentiate the halves "by orienting the divining tray and the two halves of the divining chain properly" The tray is what fixes which side is right.
Bascom records the term for the marks themselves: they are known as ojú ọpọ́n, the eyes of the tray .
Abimbola notes that these carved trays are among the most admired Yorùbá woodcarvings, citing Frobenius illustrating twenty of them and Bascom describing the form as probably the most versatile produced by Yorùbá woodcarvers . The art-historical treatment belongs to the arts section rather than here.
A yellowish powder made by termites on the ìrosùn tree, in which the marks are drawn . Powders from other trees, including akee apple, ìrókò and bamboo, are sometimes substituted .
It is not merely a writing surface. Abimbola: the diviner keeps it "as something of high symbolic and medicinal value," many Ifá medicinal preparations are made with it because like the sacred palm nuts it is held to symbolise the ritual and ancient power of Ifá, and after divination the client swallows part of it and rubs part on his forehead .
Abimbola elsewhere notes a connection drawn between the powder and Ọ̀ṣun, since yellow is her colour .
The marking technique is documented precisely. Bascom: a single line is made with the middle finger of the right hand, a double line with the middle and ring fingers together, pushing or pressing the powder away from the diviner so the darker tray surface shows through . The process is called tẹfá, to press Ifá .
A tapered object of carved ivory, wood or brass, thin at the apex and thick at the base like an elephant tusk . The diviner holds it as a sign of authority, and for a high-ranking diviner one of his pupils carries it before him .
Its use is to strike the tray during divination, which is understood to invoke the presence of Ifá . Abimbola notes that a loud noise mentioned in one of the verses must have been produced by striking the ìróké on the divining board .
The container for the ikin, usually with a carved lid . Abimbola describes it as divided into four compartments with raised edges plus a central portion; the four compartments are said to be symbolic of the four corners of the earth, and the ikin are kept in the central part to symbolise the central position Ifá occupies in the Yorùbá world-view . Other objects, cowries, kolanuts, and sometimes the chain itself, are kept in the compartments .
A note on terminology. Abimbola's text discusses these under ọpọ́n Ifá, awo Ifá as wooden bowls, trays and dishes, and does not use the word agere in the passage I worked from. Agere Ifá is the term standard in museum catalogues and art-historical writing for the carved, often figurated cup that holds the palm nuts. I use it here for clarity and flag that the terminological mapping between the ethnographic and art-historical literatures is not one to one. Confidence: medium.
The instruments for narrowing a message to a specific answer. Abimbola: "it consists of a pair of cowries sewn together which stands for 'yes' and a piece of bone which stands for 'no'"
Other objects supplement these, each symbolic: a piece of hard stone for good health and a strong body, the black seed of the akee apple for Ọ̀rúnmìlà himself, who is held to be very black . Every diviner carries a number of such objects, chosen from things the Yorùbá associate with particular human characteristics .
A cotton or leather bag, typically dyed in indigo, carried on the shoulder, holding the chain, the ìbò, the ìróké and the rest . Diviners are called akápò, carriers of the Ifá bag, from this habit, and the bag is the most visible marker distinguishing a diviner in a crowd .
Abimbola gives the reason it is always carried, and it is a professional obligation rather than convenience: anyone could stop a diviner on the road and ask for divination, "the ever-patient Ifa priest must never refuse any such request," and he must not be able to plead that his instruments are elsewhere .
An iron staff handled only by senior diviners, held to symbolise a divinity closely associated with Ifá worship . It must never be allowed to fall on its side, and is kept upright in a corner out of reach of children and animals, which supports the saying "Ọ̀rọ̀ gangan ni à ń bọ Ọ̀ṣun", Ọ̀ṣun is always found in an erect position . This Ọ̀ṣun is the Ifá staff and is not to be confused with the òrìṣà Ọ̀ṣun.
Private consultations take place in a secluded part of the diviner's house . Public divination happens when a matter affects the whole community, such as failure of rain, epidemic disease, or locusts, and is held in public or in the ruler's court with important members of the community present as witnesses, conducted by high-ranking diviners .
The client speaks to the divination instruments, or to a coin or cowry shell which he then drops on them . He speaks silently or in a whisper.
The stated reason is the epistemological centre of the whole system. Abimbola: this is done "so as to prevent the possibility of creating a bias in the mind of the Ifa priest regarding the interpretation of the Odù that will eventually appear" The procedure is designed to deny the practitioner information that would let him tailor the answer.
The diviner manipulates the ikin or throws the ọ̀pẹ̀lẹ̀ to arrive at a signature, by the mechanics set out in file 02 . The first figure cast is retained until it is time to recite. Bascom records its name: opó ilẹ̀, post of the ground, "because it 'stands on the ground'"
The diviner "proceeds immediately to chant as many poems as he knows from that particular Odù" He does not know the question. He is not selecting for relevance because he has no basis on which to select.
The client stops him. Abimbola: "It is incumbent on the client to stop the Ifa priest when he arrives at the poem which seems to be most relevant to his own purposes. In other words, it is the client himself who selects the poem which is relevant to his own problem"
Once the relevant verse is identified the diviner interprets it, and the interpretation "includes the prediction and warning of Ifá contained in the poem as well as the sacrifice that the client must offer"
The offering is not invented. It is attached to the verse and learned with it: part of the training "consists of the memorization of materials required for the performance of the relevant sacrifice to each Ifá poem," and "to every Ifá poem there must be a prescribed sacrifice" The diviner is reporting what the verse specifies.
If the client has further questions the diviner uses the ìbò . Abimbola notes this stage "usually takes more time than all the previous steps put together"
The procedure: the client whispers a yes/no question to the ìbò, the diviner takes them and touches them to his instruments, telling Ifá the question has been heard and asking for the answer . The client holds one ìbò in each closed fist. The diviner then casts twice.
The resolution rule turns on the seniority ranking from file 03. Abimbola: if the second cast produces an Odù senior to the first, the diviner asks the client to open his right hand; if junior, the left . Whichever object is in the named hand gives the answer: the cowries mean yes, the bone means no . If the answer is no, the process continues until a yes is found .
Bascom describes the same mechanism from the other side: the diviner "makes two casts, one for the affirmative statement and one for the negative, and the answer is that proposition for which the higher ranking figure is cast"
This is why the ranking disputes documented in file 03 are not academic. Two lineages with different orders will resolve the same pair of casts to opposite answers. Bascom's observation that the ranking "is important for answering questions asked in terms of specific alternatives" is the operational point .
Abimbola's account of what happens next is notable for how much latitude the client has.
Performing the offering immediately is held to be more effective than delaying, "however, the client is not forced to perform the sacrifice immediately. In fact, he may refuse to perform the sacrifice altogether"
When the client is ready, the materials are assembled and the diviner determines, sometimes with further use of the ìbò and further casting, what is to be done with the offering . It may be placed at a crossroads, or at the shrine of a particular divinity . The diviner may or may not be permitted to keep part of it . Disposal follows the wishes of the divinity and the ritual practice relevant to the case .
The doctrinal weight placed on offering is heavy: many verses end by stressing its importance and warning about the consequences of neglect, and the neglect of prescribed offering is the hinge on which a large proportion of verse outcomes turn . The concept of ẹbọ itself belongs to the cosmology section.
This division is the reason the system resists the fortune-telling description, and it is worth stating as a list.
The diviner does not decide what the client's question is, since he is not told it . He does not decide which Odù appears, since that is produced by the cast. He does not decide which verse is relevant, since the client stops him . He does not decide what offering is required, since it is attached to the verse he learned . He does not decide the answer to a yes/no question, since that follows from the seniority comparison . He does not decide whether the client complies .
The diviner does decide which of the verses he knows for that Odù to recite and in what order, which is a real and under-examined discretion given that he may know only a fraction of them. He decides how to interpret the chosen verse against a situation he now knows something about. He decides how to phrase warnings. He decides, sometimes with further casting, how the offering is to be disposed of .
What he brings is the corpus itself. His value is memory, interpretive skill, and the specialised knowledge (medicine, midwifery, and what Abimbola calls the psychiatric function) that his post-initiation training gave him .
The design intent is legible whether or not one accepts the system's premises. Several structural features work together to constrain the practitioner: the client's question is hidden, the outcome is randomised, the verse is client-selected, and the prescription is fixed to the verse. Between them they leave the diviner much less room to fabricate than a naive account of divination would assume.
The published record is partial and the gaps are not accidental.
The invocations that open a consultation, the formulae addressed to Ọ̀rúnmìlà and to Èṣù, and the sequence of salutations are described in outline in the literature but not reproduced here.
Initiation-restricted procedure, and anything associated with the òrìṣà Odù, is not public. Ogunnaike notes that both the sacred corpus and the òrìṣà Odù are closely guarded secrets .
The preparation of àkọ́ṣẹ́ and medicines attached to verses is specialist knowledge transmitted within the profession and is largely unpublished, Verger's compilation being the major exception .
Regional variation in procedure is real and under-documented. The accounts here are principally Abimbola's, from southwestern Yorùbáland, and Bascom's, weighted toward Ifẹ̀.
Anyone who wants to know how divination is done, as opposed to what it is, has to be taught by a practitioner over years. Confidence on the completeness of this description: contested, in the specific sense that it is an accurate account of what has been published and the published record is known to be incomplete.
Each Odù is two columns of four marks, every mark single or double, giving four bits per column, eight bits in total, and exactly 256 possible signatures.
The verses filed under each Odù are case reports in verse, built to a described eight-part structure, held collectively across practitioners rather than by any one person.
The decade or more of memorisation before initiation, the stages of entry, how knowledge is checked between practitioners, and the real disagreement about women in Ifá.
How the sixteen-cowrie system, kola divination, and the Fon, Ewe, Cuban and Brazilian relatives relate to Ifá, and why formal similarity is weaker evidence than it looks.
Ifá is a Yorùbá system for reaching a decision by casting a signature, retrieving the memorised verses filed under it, and reasoning from the precedents they contain.
All 256 Odù listed with signatures, the 16 principal Odù in the competing ranking orders, and an honest account of where the sources disagree.