This series consists of Sayre's research notes and data, as well as some articles he collected and a few papers sent to him by colleagues. Materials include correspondence, handwritten notes, graphs, and drawings. Also here are workshops he participated in at the Oak Ridge Institute of Nuclear Studies and on Computer Aided System Simulation and Analysis and Design at the University of Houston. There is a grouping of materials from Sayre's involvement in the Egypt Water Use and Management Project. The series is arranged chronologically by year, with undated materials at the end.