The Reiter Notebooks include Paul Reiter’s collection of UNM field school and Museum of New Mexico materials. The Notebooks include material from all aspects of Paul Reiter’s career between 1929 and 1938 and reflect his varied roles with UNM and the Museum of New Mexico. The bulk of the material in the Notebooks was generated by the University of New Mexico field school, which operated in Chaco Canyon from 1929 to 1942 and again in 1947. The field school began as a joint operation between UNM and the School of American Research (SAR) and Museum of New Mexico (MNM) under the direction of Edgar L. Hewett, who served as director from 1929 to 1934. The collaboration between UNM and SAR/MNM lasted until 1935; after 1935, UNM operated the Chaco field schools independently. The Notebooks contain reports, notes, correspondence, and associated graphic materials describing excavations conducted at Chaco Canyon by the UNM field school between 1929 and 1938. This material primarily relates to the site of Chetro Ketl, but also includes reports and notes on other major sites in Chaco Canyon, such as Talus Unit 1 and Casa Rinconada; tree ring studies by Florence Hawley; and reports and notes from the UNM field school in Jemez, which ran concurrently with the Chaco Canyon field school. The Notebooks also contain records, inventories, notes, and correspondence related to Reiter’s position as Curator of Archaeology at the Museum of New Mexico, which he held from 1931 to 1938, as well as Reiter’s personal notes and research, including drafts of his 1933 M.A. thesis on Chetro Ketl. The Notebooks provide a record of the activities of the UNM field school in Chaco Canyon and the Museum of New Mexico while also reflecting Reiter’s personal interests. Most of the material was collected by Reiter during his association with the field school, first as a student from 1929 to 1932 and then as a faculty member in 1933, 1940-1941, and 1947. Reiter made multiple copies of student reports for his personal research use and kept both Museum of New Mexico materials and his own notes and research intermixed with them; he later bound all of this material into 6 volumes. For the most part, the Notebooks lack a strong sense of internal organization. In some cases, multiple copies of the same report were bound in separate volumes or a single report or set of notes was split up and bound in separate volumes. This organization has been retained to preserve Paul Reiter’s original order. Any inconsistencies in order, as well as the existence of multiple copies, are noted in the individual file unit records