DICK DARBY THE COBBLEROh me name is Dick Darby, I'm a cobbler
I served me time at the old camp
Some call me an old agitator
But now I'm resolved to repent
With me intwing of an ingthing of an idayNow my father was hung for sheep stealing
With me intwing of an ingthing of an iday
With me roo boo boo roo boo boo randy
And me lab stone keeps beating away
Me mother was burned for a witch
My sister's a dandy housekeeper
And I'm a mechanical switchAh it's forty long years I have traveled
All by the contents of me pack
Me hammers, me awls, and me pinches
I carry them all on me backOh my wife she is humpy, she's lumpy
My wife, she's the devil, she's black
And no matter what I may do with her
Her tongue it goes clickety clackIt was early one fine summer's morning
A little before it twas day
I dipped her three times in the river
And carelessly bad her "Good day"
Murder ballads like "The House Carpenter", "The Twa Brithers", and "Oxford City", as well as bawdry like "The Little Ball of Yarn" and "Ten Nights Drunk" are sung by the tinkers but also by house-people. They also sing songs in the Gaelic, esp. love ballads like "The Red-Haired Man's Wife".
The only other songs I know about tinkers are "Robin Hood and the Tinker" - a very old (and very long) song, and "The Jolly Tinker", but that's exceedingly bawdy and not fit to repeat (until we've all had a coupla beers).