mmm, the recording of Log Drivers Waltz in the NFB animation was not by the McGarrigles, it was a commercial quasi-folksinger named Michael Mitchell. I auditioned for his band once but did not please him completely...

The McGarrigles had a long friendship with Wade Hemsworth going back to the Montreal folk scene of the mid-sixties, and recorded many of his songs. He wasn't prolific, he wrote less than 20 during his lifetime. But they were all good and some were great.