An American librarian cast himself in the role of a user and made a series of relatively disciplined visits to a substantial number of middle-sized and middle-aged British university libraries during 1966-67 to study the provision of services and the use of materials and resources in British academic libraries. After two months of preliminary exploratory activity, it was decided to visit a number of libraries with bibliographies in hand to be searched before conferring with librarians. General reactions and impressions are described. The search of 52 titles listed by the contributors to "The Historiography of the British Empire Commonwealth" provided a test of access devices in the libraries. A "Time in Type Test" of 74 titles mainly selected in North America from a large group of references accumulated over several decades was also utilized. The complete listing, with comments is appended. (AB)