This was a chart hit in Britain in the 60's for Rolf Harris. At the time it was said to date from the Crimean War (mid-1850's). This is how I remember him singing it.

Two little boys had 2 little toys,
Each had a wooden horse
Gaily they'd play, each summer's day,
Warriors both, of course.
One little chap then had a mishap
Broke off his horse's head
Wept for his toy, then cried with joy
When his loving playmate said

Do you think I could leave you crying,
When there's room on my horse for two?
Climb up here, Jack, we'll soon be flying,
I can ride just as fast with two.
When we grow up we'll both be soldiers,
And our horses will not be toys,
And I wonder if we'll remember
when we were two little boys.

Long years passed, war came at last,
Bravely they marched away
[sorry, can't remember this line - it's about the noise and smoke of the battle]
Wounded and dying lay
Then came a shout, a horse dashes out,
Out from the ranks so blue
Galloped away to where Joe lay,
Then came a voice he knew

Do you think I could leave you dying,
When there's room on my horse for two?
Climb up here, Joe, we'll soon be flying,
Back to the ranks so blue.
Can't you see, Jack, I'm all a-tremble,
Perhaps it's the battle's noise
Or perhaps it's that I remember
When we were two little boys.

Wassail! V