The (Mormon) link you have for the New World elephants unfortunately consists of dated material, poor photocopies of dated material, and no recent photographs of any of the alleged pictographs, stones and artifacts. Got something more substantial?

The little mummified man from Wyoming was x-rayed, and most recent studies of those, and of a more recently acquired tiny mummy, reveal them to be most likely the remains of anencephalic infants.

http://www.casperstartribune.net/articles/2005/02/03/news/wyoming/3b6d4aad0120fde187256f9c00839d78.txt