"By-Tor and the Snow Dog" is the fourth song on the band's second album, Fly By Night.
It was the first Rush song to be divided up into "movements" on the albums liner notes, and takes significant influence from Yes's epic, "The Gates of Delirium" with the inclusion of the battle scene and its aftermath as musical themes.
"By-Tor and the Snow Dog" was inspired by Rush roadie Howard Ungerleider's story of him…
Tobes of Hades, lit by flickering torchlight
The netherworld is gathered in the glare
Prince By-Tor takes the cavern to the north light
The sign of Eth is rising in the air