Collection includes: 'Extracted from The Observatory Vol. LVIII, 1935' - 'Arab Astronomy' by M.A. Evershed; Typed notes on Arabian Constellations' - 'Extracts from "Hieroglyphs of the Heavens" by Esther Singleton, in the Scientific American, 4/9/09; 'Production of a high Resolving Power by means of Multilayer coatings' reprinted from Nature, vol. 169, p. 790, May 10, 1952; a typed letter with handwritten notes from David to Uncle Jack regarding emission lines.