Unidentified Hurault? Arms in a French Book of Hours

I am currently trying to identify some arms that appear twice in a Book of Hours, made in Paris(?) in the first half of the 16th century. They appear filling a half-page space at the end of the Extracts from the Four Gospels:

and again, rather cropped, in the lower border at the beginning of the Hours of the Virgin:

Catalogues de vente numérisés contenant des manuscrits médiévaux

Jean-Luc Deuffic has added an extremely useful page called Catalogues de vente numérisés contenant des manuscrits médiévaux to one of his websites. I am sure that as I explore the catalogues he has located online it will prompt more posts here in due course.

A Reims Book of Hours written by Raulinus de Sorcy

A full set of digital images have recently been made available of a Book of Hours of the Use of Reims, now in Houston. It was alluded to at the end of a list of Reims Horae by Jean-Luc Deuffic in 2007, on his Pecia blog, and has recently been blogged about at Houston.

Following the gospel extracts (fol.15r) is the scribal colophon:

"Raulinus de Sorcy scrip-
toris hunc librum scripsit. et
in omnibus complevit. Misereatur sibi deus."