Medieval Music leaf on vellum

"Gloria Patri et filio et spiritui sancto..."

      Italy: c1490. Double leaf. 360 x 485mm. The leaf is a palimpsest with traces of the original text of a larger leaf written crossways to ours. The verso of the leaves are blank and the leaf is probably a binding rescue. There are two holes in the text (one in each leaf) which are patched (some text lost); there is dampstaining at the outer edges and some worming in the inner margin. 4 line music staff in red with text in Gothic hand with 8 colored initials in alternating red and blue. The manuscript was probably added to the leaf after it was used in a binding. An old note claims it was from the collection of "John H. Carter."