Remember the scene in Close Encounters of the Third Kind when Richard Dreyfuss obsessively worked to recreate in his living room the mountain that was imprinted in his mind by the aliens?
For me, that "mountain" is the sourdough bread that Larraburu Brother's of San Francisco made. Larraburu had a Gold Rush era sourdough and a gorgeous crust and crumb. Unfortunately Larraburu went out of business in the 70s. It's taken me nearly 40 years but I'm finally making dough that reminds me of Larraburu.