It used to be one of Arthur Argo's party pieces at the Aberdeen Folk Club! I've also heard a recorded version by the Caern Folk Trio in the 60/70s titled "the Railway Porter" although I think it's more well known as "Wille Wee".
Re first fittin'....a lump of coal was the traditional present, ...."lang may yer lum reek"....or a gift of tea!...in my days in Dundee onnywey.