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Most of the material here is Hasse's work but there is some correspondence and a draft for a further collaborative paper.
E.1-2: Letters from Hasse, May 1933-November 1935, chiefly concerning the joint paper, mostly in English.
E.3: 'Gaussian sums in finite fields', by H. Davenport and H. Hasse. 12pp. typescript and ms. draft with ms. corrections.
E.4-5: Miscellaneous ms. notes and calculations by Hasse, in English and German. E.4 includes sets of notes dated 28 September 1933 and 10 December 1935.
E.6: 7pp. ms. draft, in German, by Hasse.
E.7-15: Copies of typescript drafts of papers by Hasse, in German, presumably sent by him to Davenport. Some have ms. corrections and some are dated, 1933-36. 9 folders

Hasse's pre-war letters are all in very fluent English, with some personal and general as well as mathematical news. His letters in German use the 'du' form right to the end.
G.116: 1932, Nov., Dec.
G.117: 1933, Jan.-June. Letter of 20 January has a ms. note by G.H. Hardy.
G.118: 1933, July-Dec. Hasse's letters of 20 and 24 October and 11 November include news of German mathematicians in Germany and abroad.
G.119: 1934. Includes material re Hasse's and Davenport's joint paper (Bibliog. 8), and Hasse's appointment at Göttingen.
G.120: 1935
G.121: 1936, 1938, 1939
G.122: 1946, 1947, 1949, 1952, 1963, 1967. (1967 death of Hasse's wife).

The later correspondence (from about 1944, when Christian names began to be used) provides interesting general information on the mathematical scene as well as continuing exchanges on research problems and papers. There are also occasional contributions from Mabel Mordell.

G.208: 1927-29. 1927 (re award of Derby Scholarship to assist Davenport at Trinity), 1929 (suggestions for reading and research; Mordell sent his draft papers to the young Davenport for comment).
G.209: 1930. Letter of 27 November suggests Davenport should take up the 'splendid opportunity' to go to Marburg to work with and teach English to Hasse.
G.210: 1931. Research and publications, mainly on congruences.
G.211: 1932-33
G.212: 1934-35
G.213: 1936, 1938, 1939
G.214 :1942, 1943, 1944
G.215: 1945-46
G.216: 1947-48. 1947 includes comments on Bibliog. 56
G.217: 1949 (not all dated). Some refer to death and obituaries of G.H. Hardy.
G.218: 1950
G.219: 1951
G.220: 1952
G.221: 1953
G.222: 1954
G.223: 1955
G.224: 1956
G.225: 1957
G.226: 1958
G.227: 1959
G.228: 1960-61. 1961 includes draft paper by Mordell 'On a Pellian Equation Conjecture', and a 2pp. untitled ms. note by Davenport.
G.229: 1962
G.230: 1963-64. Includes draft paper by Mordell
G.231: 1965
G.232: 1967-68

Card of 1928 congratulates 'Dave' on Yeats prize; correspondence 1940-46 describes wartime work for Admiralty, raids on Bath, visit to Germany and meeting with Hasse 1945, etc.