Bateman wrote*:

"...By the sudden fall of two of the sides and the adjacent earth, a very pretty vase of small size was crushed to pieces, the fragments mingling with the burnt human bones in company with which it had for ages occupied the sepulchral chamber."

I can't find any other mention of human remains found.

*Thomas Bateman. Ten Years' Diggings in Celtic and Saxon Grave-hills (1861)