Correspondence with B.E.J. Pagel regarding his memorandum 'Spectrographic Equipment for Cassegrain Focus of AAT'; a conversation with W. Sargent, California Institute of Technology, about the unrealistic British proposals for Anglo-Australian Telescope instrumentation; Cassegrain spectrographs; designing large telescopes without reference to previous American and Canadian experience; Mylar and Melinex film bases; seeing conditions at the Siding Spring Observatory; guest investigators for the Anglo-Australian Telescope; recommendations of P.I.L.O.T. (Panel of Instrumentation for Large Optical Telescopes); and mirror coatings.