Sorry, Jim. But nor being nasty in resisting your impugning my memory. I happen to have a very good and accurate memory, & I would take my oath in any court on any referent you could name that I heard Robin attribute that song to Thurso Berwick, not once, but again and again and again and again...

Note also the somewhat ambiguous last sentence of this sleeve note by Robin & Jimmie to their Glasgow Street Songs album ~~

Sky High Joe
Shortly after the coronation of Elizabeth II of England (1st of Scotland), the calm dignity of Edinburgh was temporarily shaken by a series of minor explosions. Gelignite was the means used" by one young man to erase the Historical inaccuracy of the gold painted "EIIR" on Edinburgh's shiny new coronation pillar boxes.
"Sky High Joe" is a collected version of two songs written by Thurso Berwick, a Glasgow schoolteacher whom we (and many other young singers) have to thank for stimulating our early interest in Scottish Folksongs. Thurso Berwick is a poet and song writer who was responsible for many of the songs written around the time of the removal of the "Wee Magic Stane".