Angles of the 4 lines on the last page: the top line is a separate thought?(!)

[Jorge_Stolfi]

Still I'm not sure any special explanation is needed for the angles on f116v. If you just look at the recto of the same folio, there is a very similar pattern where the first three words of the page are almost perfectly placed on a line, while the rest is very wobbly.

Beware that the pages were not pressed flat when imaged.  The North edge of that folio is curved suggesting that it bulges out from its mean plane   

So the first line may have been meant to be straight, and may have been straight when written; but it looks curved on the image perhaps because of the warp.  The two straight lines may be (ahem, cough, cough) just pareidolia...

All the best, --stolfi