I had forgotten about Catswalk and Cayenne (both are pretty lame/bad). And I just now discovered that Stuart plays bass on Cayenne (from wikipedia):
"Cayenne" and two other homemade Quarrymen recordings, "Hallelujah, I Love Her So" and "You'll Be Mine", were included in Anthology 1, a collection of Beatles rarities and alternate tracks from 1958 to 1964. They are the only officially released Beatles recordings to feature Stuart Sutcliffe on bass. Sutcliffe, John Lennon's close friend from art college, joined the band in 1960 as the bass player and played with them in Hamburg in 1960 and 1961 before leaving to concentrate on his art studies. Sutcliffe died of a brain haemorrhage in 1962. Although the tape was made in 1960, the tape was not discovered until much later by the McCartney's neighbors on 20 Forthlin Road.