I'm looking for the words to the refrain (or all of it if possible) of the Old Ohio Canal Song. Some of it goes

Tramp, tramp, tramp, tramp, tighten up the line
............... the flies as up the mule(s?) they climb
Who back, cuss the mule forget it, I never shall
I'm every inch a sailor on the Ohio Canal

I'm told it may have come from one of the Erie Canal songs. I thought there had been a thread on this some time back, tried but couldn't find one. The friend I had it from got it from Dick Swain, where he picked it up, I couldn't begain to guess. Any words and info would be great. Thanks. Barry