e always felt that maybe [Usonian] was a system, construction system, which the ordinary person could use. They could go to the lumber yard, or the building material yards, pick up the concrete blocks, and they would have a concrete man lay the foundation and a mason set the first course of block. And then after that, they would stack them like building blocks, like a child would.
And then you put steel rods in-between the blocks and pour the grout. You didnt have to strike a mortar joint as you do with regular concrete block. You just stack the blocks and then pour the grout in-between... he had started that system way back in 1922 in California, and here he was in 1956 still working with that system. In fact, right up to his death in 1959.