I've got the 'Bold Navigators' also but, if my copy ever had a lyric sheet, it doesn't have one now. There is a note on the cover, though, that all the songs, together with their sources and a full bibliography can be found in a book 'Canal Songs' by Jon Raven, obtainable from 68 Limes Road, Tettenhall, Wolverhampton. That's a 1975 address so it would be very lucky if it's still applicable.

--Stewie.