This accession consists of a log book, prepared by Arthur Edward Lilley, describing meetings, correspondence, reports, and other events in the history of the attempt to build a large radio telescope by the Cambridge Radio Observatory Committee (CAMROC) and the Northeast Radio Observatory Corporation (NEROC). CAMROC and NEROC were set up by the Smithsonian Astrophysical Observatory in conjunction with Harvard and MIT to manage the development and operation of the telescope, which was never built.