MY HIGHLAND GOAT

Here's how I learned it:
The Highland goat-i-ote-i-ote
was feeling fine-i-ine-i-ine
he ate three shirts-i-erts-i-erts
right off the line-i-ine-i-ine
his master gave-i-ave-i-ave
him an awful whack-i-ack-i-ack
and tied him to-i-oo-i-oo
the railroad track-i-ack-i-ack
The five-fifteen-i-een-i-een
was roaring by -i-i-i-i
The highland goat-i-oat-i-ote
was sure to die-i-i-i-i
he gave three bleats-i-eats-i-eats
of mortal pain-i-ain-i-ain
coughed up the shirts-i-erts-i-erts
and flagged the train-i-ain-i-ain.

where in the world does this song come from, and how the hell do I know it. I must have learned it when I was four years old.