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Given to Ruth Daniel by GED.

Papers relating to Wordsworth and associated work, and the study of English language. Material is undated, but was probably created during the 20 years or so before HSD's death.

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This section offers patchy coverage of Jeffreys's research studies. However, there is good documentation of her most significant periods of research. There are a few notebooks from her period as a research student under R.H. Fowler in Cambridge in the mid-1920s but the bulk of the material is in the form of a series of labelled research folders organised by topic containing notes and drafts, calculations and offprints. A number of the items in the series are accompanied by later explanatory notes by Jeffreys. The series includes material from the winter semester of 1927-1928 spent in Göttingen, where she worked under Max Born and Werner Heisenberg; from the late 1920s relating to her research on polarization of atomic cores, a topic suggested to her by D.R. Hartree; work on degenerate gases in the 1930s; and on the Relativistic Self-Consistent Field from the 1930s through to the 1970s. Research material from after her marriage includes work in the 1950s on Multipole Radiation. There is only a little material illustrative of her developing interest in areas of study introduced to her by her husband, although there is additional material preserved in the archive of Sir Harold. Other miscellaneous research papers include some documentation of the work of a former student Mary Walmsley from the 1960s and early 1970s.

This section is chiefly concerned with Jeffreys's interest in the history of science, and mathematics in particular. It is dominated by a sequence of material (notes, correspondence, offprints etc) on a large number of eminent scientists, both contemporaries of hers and historical figures. There is significant material in particular on Mary Lucy Cartwright, Paul Adrien Maurice Dirac, John Arthur Gaunt, Douglas Rayner Hartree, Inge Lehmann and Barbara Mary Middlehurst. The section includes a little general material on the history of mathematics and science. Jeffreys's concern for the place of women in science is partly indicated by the high proportion of individual women scientists in the main sequence, but there is also general material on this issue, including correspondence with Joan Mason, the founder of AWISE, the Association for Women in Science and Engineering, and correspondence and papers relating to the influential 1992 White Paper on Science and Technology and the resultant 1993 report The Rising Tide. Jeffreys interests in education represented includes material relating to the teaching of mathematics in schools and the admission of men to previously all-women Colleges.

The documentation comprises notebooks, manuscript working, data, drafts, correspondence and off-prints. The earliest material is a group of nine small notebooks used by Jeffreys for natural history notes, 1902-1915. There are also significant components relating to probability and statistics, and seismology, especially the later work in collaboration with R.S. Sidhu, M. Gogna and M. Shimshoni. Additionally, at the end of the alphabetical sequence, there is a small group of miscellaneous papers, including manuscripts by C.G. Darwin, and drafts relating to theses supervised by Jeffreys: V.S. Huzubazar in respect of statistics (1949) and E.P. Arnold in respect of the revision of seismological tables (1965).

Closed except with the express permission of the Hoyle family