Paris . Rés. Vmd. Ms. 27, known as Tl.1, or the Thibault Manuscript, is one of the earliest extant sources of lute music, containing twenty-four solos and eighty-six accompaniments for vocal compositions. The manuscript was copied in Italian lute tablature lacking rhythm signs, which makes it inaccessible for modern performance. Each selection contains a full score of the four-part vocal concordance, and the reconstructed lute part in both the original notation and keyboard transcription. The introductory study elaborates upon the creation dates for Tl.1 (ca. 1502-1512) through its relationship with the sources of the time and with the older unwritten tradition of Italian secular music that is apparent in the formal treatment of the music.