"trail' is what's written in my copy of "The Norman Shield" which was our pledge manual - from which we had to memorize the Sweetheart Song and others, like this one:

Hark through the night comes the sound of voices
Raised by a loyal and lusty crew
The Sigs are marching and chanting praises
Of friendships lasting and hearts so true

And as we march alomng, we'll sing a song
In praise of dear old Sigma Chi
We'll sing a grand old song,
A Sig I am, a Sig I'll be until I die