On CBC Radio last night they played a Stan Rogers song that may only have been recorded once. If you visit the archive for Sept 8 you will find the segment at the beginning of part 2.

Here's the write up from the web page:

In '72, Peter Mesheau was a 19 yr old, b'casting student at Fanshawe College in London, Ont. While he was there, Mesheau bought a song from Stan Rogers, for a case of beer. For the last 20 yrs, that tape was hidden in a shoebox and forgotten. Peter Mesheau is now the Min., of Economic Development Culture and Tourism for N.B. And, he's found the tape. 6:48

And now for the first and last time on nat'l radio, Pocketful of Gold. 5:10