However far we may follow the extracts from the archives of Mantua in the fifteenth century, we get nothing definite in regard to the production of the first Italian secular and lyric drama at that court. We are driven into the hazardous realm of conjecture as to the relations between its production and the prominent musicians who formed part of the suite of the Marquis. This indeed is but natural, since it could not be expected of the Marquis and his associates that they should know they were making history. We learn that in 1481 Gian Pietro della Viola, a Florentine by birth, accompanied Clara Gonzaga when she became the Duchess of Montpensier and that he returned to Mantua in 1484--the year after "Orfeo" was probably produced. We learn that he composed the music for the ballerino, Lorenzo Lavagnolo, who returned to Mantua in 1485 after having been since 1479 in the service of the Duchess Bona of Savoy. We are at least free to conjecture that before 1479 Lavagnolo trained the chorus of Mantua in dancing so that he may have contributed something to the ballata which we shall at the proper place see as a number in Poliziano's "Orfeo." Travel between the courts of Mantua and Ferrara was not unfamiliar to musicians, and there is reason to believe that those of the former court often sought instruction from those of the latter. For example, it is on record that Gian Andrea di Alessandro, who became organist to the Marquis of Mantua in 1485, was sent in 1490 to Ferrara that he might "learn better song and playing the organ from Girolamo del Bruno." In 1492 he was sufficiently instructed to be sent by the Marquis to San Benedetto to play for the ambassador from Venice to Milan. The celebrated composer of frottole, Bartolomeo Tromboncino, was for some time in the service of the Mantuan court. It was formerly believed that he went to Mantua in 1494, but Signer Bertolotti unearthed a document which showed that his father was engaged there in 1487. From which the learned Italian investigator reached the conclusion that the young Tromboncino was with his parent. It seems to be pretty well established that the two went together to Venice in 1495. But he returned to Mantua and for many years passed some of his time at that court and some at Ferrara. For example, we learn that in 1497 the Cardinal d'Este promised the Marchioness of Mantua that she should have some new compositions by Tromboncino. Yet in 1499 he was sent with other musicians of the suite of the Gonzagas to Vincenza to sing a vesper service in some church. It appears that Tromboncino was not only a composer, but an instrumental musician and a singer.