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Postcards and some greetings cards retained by Jeffreys in discrete sequences arranged by year. Not indexed.

The bulk of this material dates from the 1980s and 1990s. The content is enormously diverse. Thank you letters, sometimes charmingly illustrated, from young children, may be found next to reminiscences from aged contemporaries, chatty letters from former pupils next to detailed scientific correspondence.

J43-J141 Sequence found in wooden filing drawers

J142-J160 Sequence found in metal filing drawers. This was divided into groups of letters, e.g. 'A-C'. The material has been further subdivided for ease of reference where required. The bulk dates from the late 1980s to the early 1990s.

J161-J189a Sequence found in envelopes and folders. Although there are earlier letters, the bulk dates from the 1990s.

J190-J207 Sequence divided by index card. This was divided by letter. It is personal correspondence, including many greetings cards. It dates from the 1990s although a large proportion of the correspondence is undated. Many of the correspondents are identified by first name only and not all appear to have been correctly filed. They include family members, although Jeffreys also seems to have often been accorded the title 'Aunt' by children of friends and former students. Retained in original order.

H1-H95 Scientists and mathematicians. Arranged alphabetically by scientist. For material re Sir Harold Jeffreys see A94-A186.

H96-H108 History of mathematics and science.

E1-E8 University of Manchester

E9-E53 University of Cambridge. The bulk of this material is manuscript lecture notes, sometimes paginated in sequences though often with unnumbered pages intercalated. It appears from the variety of inks, paper sizes etc that many lecture notes were reused over years.