Mistakes About The Past.
Another convergence -
An idol is drawn in procession through the land by an oxcart, then the slaves who wash the idol in a secluded lake are drowned. Everard remarks that the goddess, Nerthus, is:
"'A pretty grim sort,'...The neopagans of his home milieu did not include her in their fairy tales of a prehistoric matriarchy when everybody was nice." (Time Patrol, p. 565)
SM Stirling's character Lisketer says:
"'From what I've read, the Olmecs had a deep spiritual relationship with nature...'" (Island In The Sea Of Time, p. 316)
The Olmecs slaughter Lisketer's crew on first contact.