Copied at the Escorial in 1604 (fol 50v, "Ano Dei 1604"), possibly by Fray Pedro de Estremera, who also wrote most of EscSL 1, EscSL 2, EscSL 4, EscSL 5, GuadM (3), MontsM 750, NYorkH 278, NYorkH 861, NYorkH 870, PastraM s.s., and several other manuscripts. Rubrics specify feasts upon which motets in the collection were to be sung.

Many folios consist of two large sheets of paper pasted together to form one large folio of double thickness. Last folio pasted to back cover.

original covers of light-brown tooled leather over wooden boards

staff height 25-35mm

Original foliation 1-77

red ink used for titles, initials, rubrics & double-line borders

Original index on f.1v lists Credos, then motets a5 alphabetically, then motets a6 alphabetically, then Marian motets and a motet a7. (One additional motet on f. 78, an Ave Maria, is no longer in the MS.)

Paper

3 Credos, 33 motets = 36

Aguilar-1, Guerau-2, Guerrero-3, A. Lobo-1, Morales-4, Palestrina-24, Periañez-1

ii + 77 paper folios, 810 x 568; last folio pasted to back cover; each folio consists of two leaves pasted together to give double thickness. Original ink foliation, 1-77. Original covers of tan leather over boards. Original index lists an additional motet on f. 78, now missing. Rubrics give feast for which the various motets are to be sung.

Late 16th-early 17th century. Copied at the Escorial.

Vol 4

Physical: Copied by a single scribe, who also wrote most of EscSL 1, EscSL 2, EscSL 4, EscSL 5, GuadM (3), MontsM 750, NYorkH 278, NYorkH 861, NYorkH 870, PastraM s.s, and several other manuscripts not within scope of this catalogue (Charles Manns). Large plain inked initials in red or black.