This Classical Sheet Music is Tallis' Canon by Thomas Tallis. For the first verse only two parts are played to illustrate the canon devise. For the second verse all four parts are played in full - Note that the first 4 notes of the Tenor part are the same as the last 4 notes of the Soprano part, and that the Bass part also echoes parts of the theme. The third verse introduces an organ accompaniment which can also be used as a solo piece.