Letters between Edwin Link, I. E. Wallen, Walter Starck II, Hubert F. O’Brien, and Giles Mead regarding a Link-Smithsonian program, a scientific cruise using Deep Diver, and an expedition on Sea Diver. Letters between Edwin Link, Thomas Morrish, and A. M. Kennedy regarding a submersible. Letter from I. E. Wallen to James McBroom regarding new initiatives in coastal areas. Letter from Edwin Link to J. L. Meiam creating a plan for their 700-foot dive.