I’ve written before about Grove Words and what they might be, and also about the curious patterns that occur at the start of lines. There’s an obvious, but unanswered question of how these two phenomena—which both affect the first glyph in a line—might interact.
I want to present here, very shortly, partial answer to this question.
The string [oa], when at the start of a word, is quite strongly associated with the start of a line. Voynichese.com gives 78 occurrences of words starting [oa], of which 32 are at the start of a line.
This is similar to words starting [sa], which occur 509 times in all, 190 times at the start of a line. We know that words starting [a] are very uncommon at the start of lines, and some kind of transformation may be causing [a] to become [sa]. It could be that, in certain (unknown) situations, [a] becomes [oa] instead of [sa].
Words starting [Goa] (where [G] is any gallows) occur 22 times. Of those, 15 occur at the start of paragraphs. These should be considered part of the Grove Word phenomenon. It should also be noted that words starting [Gs] are very rare.
From these observations we can draw a few of tentative conclusion: 1) that Grove Words and linestart patterns are distinct; 2) that they can both apply to a single word; and 3) that the line start patterns occur more ‘interior’ to a word and Grove Words are more ‘exterior’.
(It might be that words starting [Gy] show the same thing: 11 of 14 occurrences of words starting [py] are Grove Words, and words starting [y] are associated with the line start.)
(Also, the transcription for the first word on f29v is wrong: it is [koaiin] not [kooiin]. I’ve seen theories using the reading [kooiin], so it pays to check the transcriptions for yourself.)