||This manuscript was found in the Catedral Metropolitana of the Mexico City, but after 1967 this scores vanished from its archives. Nowadays the only source available is a microfilm made in the middle of 20th century, keeped by Museo de Antropologia y Historia.
The first part of the manuscript (from begin until the page 16) is a copy of some Violin Sonatas, op. 5 by Corelli with some pages missing. The remaining part (page 17 to end) is a set of 34 anonymous sonatas, numbered from 21 to 54, witch the first 20 has been lost. There is no indication of instrumentation in this sonatas, probably it is written for harpsichord because the use of standard notation in 18h century for this instrument (C1 and F4 clefs).