Petrucci's nine books of frottole (Venice, 1509) contain all of Tromboncino's.
Carlo Delaunasy, a singer in the service of Isabella, Marchioness of Mantua in 1499, and Marco Carra, director of music to the Marquis in 1503, 1514 and 1525, are among the names unearthed from the archives of Mantua by their keeper at the request of Mr.Vander Straeten.

These papers contained the names of a few other singers, players and directors, but their inadequacy was demonstrated by the fact that they contained no mention of Jacques de Wert, a composer of great activity and talent, to whom Vander Straeten devotes some fifteen pages of his exhaustive work.
De Wert was born in Flanders near the end of the first half of the sixteenth century.

While yet a child he was a choir boy in the service of Maria de Cardona, Marchesa della Padulla.

Subsequently he entered the service of Count Alfonso of Novellara and in 1558 he published a book of madrigals which attracted widespread attention.

Ten years later we find him at the court of Mantua, where his happiness was destroyed by the conduct of his wife.