I was not able to find a website for McGill and/or Reynolds, but several other sites attribute the song to them, so I will accept that until/unless someone has information to the contrary. I went to Johnny Russell's website (johnnyrussell.com) and was not able to find anything about the song's authorship, but I did find a long clip of him singing the song. Let's see if this really long web address works as a blicky.

Genie