Grove's Titles

[RobGea]

Aha found some prallels,maybe.
2-right justified texts in red here You are not allowed to view links. Register or Login to view..

And on the next folio, 2 centred texts and 2 grove titles  also in red ink. You are not allowed to view links. Register or Login to view.

Thats UPenn Schoenberg LJS 62.
the notes say "headings, captions, small initials, and large initials (sometimes with flourishes and extensions)"

Don't know quite what headings and captions refers to in a Medieval mss or why there are 3 types.

If someone could explain more that would be great.