Yantra / Yan (nyan)

What this is

A yantra — Lanna nyan (ยันต์) — is a sacred diagram: a grid of syllables, numbers and figures that concentrates protective or auspicious power into a drawable form. Where a katha is the spell spoken, a nyan is the spell inscribed — laid onto cloth, paper, metal foil or skin so that its efficacy stays fixed in an object. The catalogue holds 74 witnesses whose titles name a nyan, and they sit squarely in the wichaa core.

> A note on the name. The corpus writes this as nyan, not yantra — the same > reason the entity was initially invisible to a naive search. Beware, too, that > nyan also transliterates ñāṇa ("insight") in scholastic titles; the match > here is pinned to the diagram sense (nyan lae katha, long nyan, standalone > nyan) to keep the two apart.

Spell and diagram are one object

The single clearest pattern is that the nyan almost never travels alone: the dominant title-form is "Nyan lae khatha" — yantra and spell — over and over. The drawn diagram and the spoken formula are two halves of one technology, bound in the same volume, and to inscribe a nyan is often literally to "long nyan" — lay the diagram down while reciting its katha. The titles name the varieties by their medium and purpose: Nyan tian luang (the great candle-yantra), Nyan nam bo kaeo (a water-yantra), Nyan pha sahang (a cloth-yantra), and bundles that fold nyan together with holasat, sainyasat and cumnum tewada (assembling the deities). This is the apotropaic heart of the saiyasat in its most concrete, material form.

The shape of the collection — a paper-and-cloth technology

Like the horā almanac, the nyan is a working object, not an archival one, and its support proves it: 67 mulberry-paper against just 7 palm-leaf. You draw a yantra; you do not inscribe it into a palm-leaf for the library. It is overwhelmingly research-priority — 61 of 74 flagged (82%) — and cuts across the wichaa genres, sitting under astrology (37) as much as magic & ritual (24). It is barely dated (3 witnesses, 1925–1954) — late paper — and it clusters in Nan (27) and Lampang (23), the vernacular working temples, with Wat Sung Men absent entirely.

In the digested textbooks — the lek-yant system

Corpus — quoted from the contributed printed wichaa textbooks (OCR-digested into the `pages` table), distinct from the palm-leaf catalogue measured above. Citations give slug and page. Where the catalogue shows the nyan as a paper-and- cloth object, the textbooks show it as a system of knowledge with its own teacher-lineage and its own internal argument about legitimacy.

• Yantra is a taught lineage of its own. A wai khru roll-call separates the masters by craft: "ครูเลขแลครูยันต์ ครูว่านแลครูยา ครูตำหรับแลครูตำรา" — "the teacher of numerals and the teacher of yantra, the teacher of waan-herbs and of medicine, the teacher of manuals and of formularies" (compendium-of-ancient-katha p14). The nyan is not a loose skill; it descends through a named ครูยันต์ (kru-yan) beside the numeral- and herb-lineages.
• "Lek-yant" — numerals and diagram are one script. The textbooks name the practice เลขยันต์ (lek-yant, "numeral-yantra") and treat it as a writing system spanning tongues: "เลขยันต์พันอักษรต่างภาษา" — "lek-yant of a thousand letters in many languages" (compendium p70), located "ในระบบเลขยันต์ต่างๆ" — "within the various lek-yant systems" — across จาม, มอญ, ขอม (Cham, Mon, Khom) scripts (supreme-maha-mantra-katha p7). This is the syllable-grid this catalogue's diagram pages render as line-art.
• An internal argument about orthodoxy. One textbook stages the tradition reflecting on itself: "พระพุทธเจ้ามิได้ทรงแจกยันต์ หากแต่ทรงแจกพุทธมนต์ มิใช่ มนตร์มาร" — "the Buddha did not hand out yantra, but Buddha-mantra; and not demon-mantra" (supreme-maha-mantra-katha p3). The claim polices a boundary — legitimate phutthamon versus illegitimate mon man — which is itself evidence that yantra sits on a contested seam between canonical Buddhism and efficacious saiyasat, exactly the seam this archive is built to hold open without flattening.

Inference — the textbook framing deepens the catalogue reading: the nyan is not only a material technology (paper, cloth, skin) but a scribal one — a script with a pedagogy, a lineage, and a live debate about where it belongs. The diagram pages in the image store are the artefacts of that script; describing them (below, and in the vision track) is what makes the lek-yant system searchable rather than merely pictured.

Notes

• Read it as one unit with the katha. The nyan/katha pairing is the atom of applied saiyasat: diagram + formula, object + utterance. Any finer pass should keep them cross-referenced rather than splitting the drawn from the spoken.
• The image is the source. Because a yantra is a visual artifact, its value is only fully captured when the page is seen, not just catalogued — this is a corpus where digitised imagery matters more than the title line, and a natural priority for the image store.
• Under-dated and under-imaged — a crawl target. High priority-density and in active living-practitioner use, yet thinly represented in the digitized record: the nyan corpus is central to the wichaa, and any practitioner's yantra-book — historical or contemporary — is a primary source worth documenting.