Quarta Tabulatura Collegii Rigensis, now kept at the University Library in Uppsala (Vok. mus. i hs. 88). The source, dated to 1620, comprises 61 pieces (by Orlando di Lasso, Jan Brant, Tomás Luis de Victoria, Christophorus Clavius, Giovanni Ferretti, Asprilio Pacelli, Teodoro Riccio, and others) entered in the manuscript in the New German tablature notation. The vast majority of works entered in the tablature are intabulations, mostly written in their original form, in a couple of works, the copyists reduced the number of parts.