I certainly can't argue with Dave about Son House. Besides lessons, Grossman also puts out videos of blues players and House appears on several of them.

Some examples are "Legends of Country Blues" Vols 1 and 2, "Legends of Bottleneck Blues Guitar", and "Legends of the Delta Blues"

By the way "Legends of Country Blues, Vol 1 has Mississippi John Hurt playing on Pete Seeger's Rainbow Quest program. Vol 2 has some footage of Leadbelly made in the late 30's and some made when he was older.

I think neither of these two should be neglected when learning about the blues. Even though neither was in the heart of Delta music, they both were alive at the time and were good enough musicians to pick up what was going on.

Murray