Guest, our posts crossed. Congratulations on your investment and your crucial 1859 discovery, as well as further references.

It would be perverse to doubt that the stage song "STB" was based on Hyslop's lyric and sung to more or less the modern marching tune.

The evidence reinforces my suggestion that the tune appeared in the '60s - though 1859 is just as likely. (It could be earlier, of course, but the evidence seems not to be there.)

Now who was the genius behind the tune?