What I did not mention is that the Baltimore manuscript appears to me also to have been written by Ursuleo, an observation that has apparently not previously been made.
|Baltimore, Walters MS W.330|
The mise-en-page of the two books is very similar, with 19 lines of text per page, although the Baltimore book is much larger, at about 290×155mm, as compared to the Tregaskis book at about 170×130mm. This being the case we cannot expect the script of the two to be identical, especially as they may have been written some years apart.
The most unusual letter-form of the Walters MS is perhaps the r with a top-stroke that curves all the way back so that it touches, or nearly touches, the minim, and the foot of the minim with a very large serif:
 Chiara Valle, Zanvyl Krieger Fellow in the Department of Manuscripts and Rare Books at the Walters, kindly tells me in an email (1 Oct., 2014) that "I have looked at the curatorial files of the manuscript W.330. I have not found anyone who recognized the hand of Pietro Ursuleo of Capua, or any other scribe, in the manuscript."