Letterforms and ligatures

Allographs

An allograph is a variant graphic form of a sign. Its distribution can depend on position in a word, neighboring signs, speed, register, period or an individual writer. Michigan’s P46 teaching alphabet shows the scribe’s lunate sigma, which resembles a Latin c, and variation in other Greek letters. It also notes that the letterforms do not divide neatly into modern upper and lower case. A modern font may print the same encoded character with a different historical shape; the encoded string alone cannot establish the original form.

Begin with same-writer repetitions. Only after establishing that range should you compare a chart from another place or century. When one trace could be two signs, note the diagnostic feature each candidate predicts: a crossbar, descender, turn, wedge or final stroke. Damage can erase exactly that feature. An honest undecided reading is better than silently replacing a difficult form with the most familiar glyph.

Joined writing

A ligature joins parts of adjacent letters into a connected graphic unit. It may be regular in a tradition or occasional in a rapid hand. A pair merely touching because of crowding need not be a conventional ligature; Michigan specifically describes crowded letters in P46 while calling the hand generally free of ligatures. In Latin Add MS 47678, the British Library’s detailed record identifies several letter joins, including ra, re and rt, alongside non-joined forms. That mixture is a useful reminder that one hand need not make every pair identically.

Trace the joined form before splitting it into modern letters. Compare its entry and exit strokes with unjoined occurrences in the same manuscript. An apparent missing letter may be a compressed component; an apparent extra stroke may be the exit stroke of the preceding letter. Record the visible join in a diplomatic note even when the searchable text uses ordinary letters.

Practice

On the P46 palaeography page, choose sigma and two other letters with more than one visible occurrence. Note stable and variable features. Then use Add MS 47678’s catalogue description to choose one reported ligature and list what an image would have to show to distinguish it from accidental touching. Do not claim to have verified a stroke from the catalogue text alone.