Bound mimeograph and positive photostat of typescript, "Discussion of Mr. Marshall's Memorandum of January 24, 1939, in re boundaries of Los Cerritos Grant, April 25, 1939," William W. Clary and Jackson W. Chance, 39 pp with nine maps bound in at p 21 (disagrees with Marshall about property line at mouth of Old San Gabriel River; maps illustrate surveying methods at river mouths and bay inlets)