There's no doubt that Steve Graham's song appeared as sheet music "copyright 1942 Leeds Music Corp." (though, oddly, the U.S. "Catalog of Copyright Entries" does not list it until January 25, 1943).

So how, in any case, do we explain this, from "The Canadian Forum" of November, *1922,* p. 45 ?:

"Dinny was singing an old song....

"Shake hands wid all the neighbours,
An' kiss the colleens all;
You're as welcome as the flowers in May
To dear old Donegal."