This sub series presents a chronological sequence of material relating to Hodgkin's visits and conferences, 1936-93, though the great bulk of the material relates to the period after the award of the Nobel Prize in 1964. There is evidence of her interest in maintaining scientific contacts with the USSR and China during the Cold War, the first of many visits taking place in 1953 (MS. Eng. c. 5670/7) and 1959 (MS. Eng. c. 5670/14) respectively, and there is evidence of visa difficulties in respect of visiting the USA (MS. Eng. c. 5670/9) during the same period. She also made frequent visits to Eastern Europe outside the USSR. India was another locus of valued scientific contacts and she made a number of extended visits, for example in 1974 (MS. Eng. c. 5672/15-17) and 1978 (MS. Eng. c. 5674/1-9).

Not all Hodgkin's travel is documented in this sub series. Records of her attendance at International Union of Crystallography congresses are to be found in the Societies and Organizations series with other IUCr material. Visits and conferences which bear on her well-known peace and humanitarian interests are to be found in the Peace and Humanitarian Interests series. These include the Pugwash Conferences on Science and World Affairs and her visits to Vietnam in 1971 and 1974. Some visits of particular biographical significance (including the award of the Nobel Prize and subsequent Nobel meetings) are documented in the Biographical series.

After the main chronological sequence there is a separate sequence of invitations declined (or with no evidence of acceptance), 1945-89.

There is also an addendum of material received too late to present in the main chronological sequence.