Bill Brown? late 1950s on Bolinas Beach

The caption where I found it is: "Joan Brown, William Brown, and Jay DeFeo at Bolinas Beach, between 1957 and 1960." Is this our old friend Bill Brown? To be honest, I never saw him without his beard, and it's been around 20 or 25 years since he passed. I can't quite tell if this is the same gentleman. I'd say at least it's "not inconsistent" in terms of age and stature. If this is indeed our old friend, please pipe up in the comments and I'll change what I'm saying here.