I take it tha tyou've looked in the DT and it wasn't there.
There is a song, to the tun eof LIttle Old Sod Shanty" and "Little Old Log Cabin in the Lane". It begins with,
I am feeling old and weary
And my eyes getting dim.
I cannot read the signals any more,
Aad that's all I can remember. If that's the song, I'll bet Dale Rose knows it. He seems to have a good handle on train songs.