NOT "RUP-A-PUM PUM"! Just to save an avalanche of Christmas cheer from falling on me----.
I am searching for lyrics to a song which I presume was written in the first half of the twentieth century.
The opening lines go --

"Little drummer boy, you're all the world to me,
Dressed up in your little soldier's clothes;
Little drummer boy, climb on your Daddy's knee,
Rest your weary head in sweet repose."

    Obviously a lullaby. A google search under the title brings a mountain of "rup-a-tum-tum"s and a wee handful of other songs --one sung by Iain Macintosh which I found interesting---but none of the one I'm searching for. Any pointers?