Different groups of leaves removed from other manuscripts. Group I is a quarto set, II an octavo set, and III consists of 1.5 pages from a 14th century Dutch Antiphonal. I and II are polyphonic. I is made up of 4 bifolios, 1 single sheet and a smaller fragment. The smaller fragment is f. IV. Both f. V (the single sheet) and f. VI are erased. The music comprises Glorias, often with Tro, Patrems (erased), and Dutch and French songs. The leaves in group I come from printed books L. fol. 54 and 56, and 106 C. 2 and 4. The old folio numbers on the first bifolio (f. 17 and 26) suggest these may have been the outer leaves of a quinio. Section II of Uu 37 is what appears to be a typical late 14th century French chansonnier, but its Netherlands origin is revealed by the music on f. 32.

Ars Nova: dotted semibreve with descending tail at the left;

11 or 12 red five-line staves per page; 9 red five-line staves per page, brown staves on f. 19v-20v and 25-26;

RISM B/IV 2: A modern portfolio containing 3 different groups of leaves removed from other manuscripts. Group I is a quarto set, II an octavo set, and III consists of 1.5 pages from a 14th century Dutch Antiphonal. Both I and II, however, are polyphonic. I is made up of 4 bifolios, 1 single sheet and a smaller fragment, all meas. c. 320 x 240 mm. if full size. The smaller fragment is f. IV. Both f. V (the single sheet) and f. VI are erased. The Ars Nova notation dates from c.1400 and is written on 11 or 12 red five-line staves per page. An unusual note-form is the dotted semibreve with descending tail at the left. The music comprises Glorias, often with Tro, Patrems (erased), and Dutch and French songs. The leaves in group I come from printed books L. fol. 54 and 56, and 106 C. 2 and 4. The old folio numbers on the first bifolio (f. 17 and 26) suggest these may have been the outer leaves of a quinio. Section II of Uu 37 is what appears to be a typical late 14th century French chansonnier, but its Netherlands origin is revealed by the music on f. 32. The maximum page size here is 220 x 170 mm. Fortunately, an old foliation at t.m.r. is intact except on what I call f. 25-26 and on the last bifolio. This has been wrongly numbered 31 and 32 by a later hand (39-40 seems more reasonable). The Ars Nova notation usually employs 9 red five-line staves per page, but on f. 19v-20v and 25-26 the staves are brown. Red notes appear in the later pieces, which have concordances with F-CH 564 and the Codex Reina. As in section I of the source, initials are red or blue. It is interesting to find Machaut well represented here by 2 Ballades. The only composer named is the otherwise unknown Clericus de Landis bone memorie. J. Susay composed Uu 37 II 5, which is here anonymous.

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