[Collection of letters on music theory with polyphonic quotations]

Description

Includes muscial quotations composed by Grafori (2), Johannis Bononiensis (1), Lago (1), Lanfranco (1), Spatoro (6) and anonymous (1) in letters written by Giovanni del Lago to Giovanni Spataro, to Lorenzo Gazo and to Pietro Aron, by Spataro to Lago and by Giovanni Maria Lanfranco to Adrian Willaert. These letters were written in Venice, Bologna and Blescia.