OK - after reading all this - here's the version that I learned in Canada back in the 60's from my parents...seems so politically incorrect now - but I loved it when I was a kid..
I'm up here in my nuthouse. My mind is in a rut
My keeper thinks I'm crazy but I'm sure she's off her nut
I'm just as sane as you are and I can prove it too
'cause when I sing this lullaby you'll know I'm not coocoo
I was born one night one morning when the whistle went boom boom
I can bake a snake and drink a cake when mudpies are in bloom
and six and six is nine and rice comes from a mine
and Old Black Joe's an Eskimo in the days of Porcupine
We know that camels sail the seas and we get honey from the fleas
and all the horses climb the trees on the road to the Mandalay.