Hello G.M.
Hoggs own title for the story was--"The Private Memoirs And Confessions Of A Fanatic". The modern title being "Confessions of a Justified Sinner".
His complete works, in two large volumes, mid? 19th.C., and not for the visually challenged, are vol.1, stories and vol.2, poetry and songs.
Who but I could mislay these works which, from memory, measure app. 11ins.x 8ins.x 2ins each.
Again, from memory, Burns and Hogg never met.
Hogg usually composed his songs to given tunes and mentioned the name of the tune under the song title. When I manage to dig out the said volumes I will check if "A Boy"s Song" has a given tune.
The stories are all well worth reading.