Michael Thacher collection on Mount Wilson

Correspondence, photographs, and ephemera related to Mount Wilson and the observatory located there, collected by writer Michael Thacher. Correspondence includes letters from astronomer Harlow Shapley related to potential talks and appearances, book publication, and salary difficulties for scientists; and letters from a variety of astronomers involved with the Mount Wilson Observatory, either as administrators, visiting astronomers, or lecturers. The collection also includes a photograph album of black and white photographs taken by astronomer and photographer Ferdinand Ellerman; press photographs of Edwin Hubble, James Jeans, Albert Michelson, Seth Nicholson, and John Strong; postcards depicting Mount Wilson Observatory, trails, hotel, and views; and brochures and other ephemera.