Pillsbury often visited Yosemite after returning to the lower 48 in 1899. There he photographed John Muir for Camera Craft Magazine in 1901, Galen Clark, George Fiske, and Theodore Roosevelt. These and other photos were later published as postcards by the Pillsbury Picture Company. Pillsbury had begun producing post cards with his photos as soon as this innovative form of communication was authorized by the United States Congress in 1898.
