As a child, one of the first educational rhymes I learned at about the age of 3 was part of the book A Box of Dates – “History Rhymes for Children and Grown-Up People” (1934) by Geoffrey Moss. Unfortunately my memory is not strong enough to recite more than the first verse, as follows:-

"Hengist and Horsa, all covered in brine

Landed in Thanet in four forty-nine"

It would be interesting to see that book, but it is unavailable so far on the Interney.