The way I learned it was:

Left, Left,
I had a good home and I left,
Left my wife and 48 children
at home and in bed in starving condition
with nothing to eat but gingerbread.
Left, Left.

I'm not sure where the breaks go, and it may have been cleaned up.

I'm looking for Roman marching songs in Latin, real ones, not one's like Kipling's that were made up later.