Halley's Comet: correspondence and promotional materials 1986
Halley's Comet: lecture notes 1986
I. Bernard Cohen correspondence 1984-1989
Cohen - Halley's Two Essays on Newton's Principia undated
Alan Hugh Cook correspondence 1982-1988
Cook - Edmond Halley, Surveyor and Military Engineer undated
Derek Howse correspondence 1983-1988
Howse - Newton, Halley and the Royal Observatory 1985
David W. Waters correspondence 1979-1988
Waters - Halley, FRS, Royal Navy and the Practice of Navigation 1985
Richard Westfall and Gerald Funk correspondence 1983-1988
Westfall and Funk - Newton and Halley undated