One of the elder generation who came north to Cambridge Massachusetts with Perls, Spiro, and Waterman. I met Son House a couple of times in the early 70s. He was still a vital force, a link to Willie Brown and ‘Little’ Robert Johnson.
I found this video while looking for Gary Davis material and had a nostalgic moment. What the open-tuning ‘holler’ style lacks in subtlety it gains in power, especially as Son House always claimed to play ‘sanctified’ music, not blues.