Correspondence from C.L. Pekeris to Edward Appleton, dated 1938-1939. The material mainly regarding Appleton and Weekes's note in Nature. It includes a copy of Pekeris's paper on similar subject from 1936, a note of meetings and papers on tides, and correspondence from S. Chapman, 1938 and G.I. Taylor, 1939, on the Krakatoa wave.

Correspondence from D.F. Martyn to Edward Appleton, dated 1946. The correspondence is mainly regarding a paper by Martyn on Solar tides, submitted to Appleton for communication to the Royal Society. The material includes comments on Martyn's paper by W.J.G. Beynon 1947, and an enthusiastic letter by S. Chapman, 1946 and Appleton's notes on papers by Martyn on atmospheric tides, given at a meeting of the Mixed Commission on the Ionosphere, 1948.

Manuscript drafts for a paper or papers on tides, almost all by Edward Appleton, but some in K. Weekes's hand, no date, c.1936-1949.

Manuscript notes and narratives by Edward Appleton on tides, no date, c.1936-1949.