"Stranger approach this grave with gravity
Charles Grey has filled his last cavity"

Spike Milligan on his show "Muses With Milligan" way back in the '60's devoted part of his programmes to these kind of rhymes.

'A baby Sardine saw his first submarine
He was scared, and watched through a peepholr
"Oh, come, come, come," said the Sardine's mum
"It's only a tinful of people'

B.