My "wee red book" (101 Scotthish Songs Ed.Norman Buchan) from which we used to belt out "the wee magic stane" in the music lessons at secondary school in the early sixties spells the writers name as Johnnie Mc Evoy . One Singer One Song book says that he went off to Canada in the late 1950.s and the tune "Villikins And His Dinah" I vaguely remember an actor of the same name in the origional Para Handy television show who played the concertina as part of his role as the ships boy. But I am not sure if the two are the same person.