Somehow I expect this song to have limited appeal (i.e., Sigma Chi members), granted it was written by two Albion undergrads in 1911. Is it widely known outside the fraternity? If so, why?
I’m familiar with the song. My mother played it on the piano and I think I can manage to get through it. I may even have the sheet music around here somewhere.
I think in earlier days it was a popular song. The lyrics were very romantic in a mushy way and that was the general taste for songs back then. I would also imagine that having young women in college was still a little new in those days.
Dean Martin recorded it after WWII and I assume that it became popular again.
Dean Martin recorded it? Well!
The autumn after I finished high school I heard the song and wrote my own verses for it, about a girl who had turned my head (I’ll call her "Evelyn.’) But a year later I heard Evelyn got married and I never sang the song again, with any verses. 
IHSV
In Hoc Signo Vinces? Well, Evelyn was (and for all I know still is) Catholic.