Hi,
I'm trying to verify if the children's counting song "Roll Over" (sometimes called "Ten in the Bed" or "Five in the Bed") is in the Public Domain. All I've found is that the children's book is based on the "traditional song." I cannot locate any source info on the song (could be a chant?) at all.

There were 10 (or 5) in the bed
And the little one said
"Roll over! Roll over!"
So they all rolled over
And one fell out

There were 4 in the bed...etc

Sharon, Lois & Bram had a version in which they sang, "and they gave a little scream and they gave a little shout: Please remember to tie a knot in your pajamas, Single beds were only meant for one!" (two, three, four, five, etc)

I've seen it noted as "traditional" and even "PD" but it is not listed on PDInfo.org.
Are there other good sites to use to verify songs in the PD?

Thanks!