Sasquatch and Melchizedek

Ok, since this place is dedicated to “oddments and marginalia” and other weird Mormon Legends, I have two that I’d like to hear more about:

1) I remember reading somewhere that there was a theory that Shem, son of Noah, was the same person as Melchizedek. And then I remember reading somewhere else, Mormon Doctrine possibly, that the theory was nonsense. But if I remember right, the first person was quoting Joseph Smith. Anyone else ever heard of this controversy, and could provide better sources than my rotten memory?

2) In an old copy of the Lectures on Faith, I remember seeing a quote from somebody’s journal about how they were riding on a horse, and a big 8 ft tall naked hair-covered man came up beside them, and then later on the Prophet told them they had seen Cain, son of Adam. Anyone know anything about this one? Makes no sense to me… first of all, how come Adam dies of old age, but Cain gets to hang out? And why does he look like Bigfoot? And how’d he make it through the flood?

Addendum: Ok, our intrepid commentators have informed me that I had it all backwards, the Cain story was in Miracle of Forgiveness and the Shem/Melchizedek story was in Lectures on Faith.