Papers and correspondence relating to chronology, 1878-1890, including L.R.B. Bennett on [Tycho's] star of 1572; the Revd J.R. O'Flaherty on the eclipse of 12 October 1605; Sir H. Rawlinson on eclipses in India, 612-613 AD; Col. Ellis on Indian chronology; H. Page on whether 1 July 1800 is 18th or 19th century; General Massey on the Sothic Cycle; J. Crumb on how often February has five Sundays; and J. Whitworth on the light of Jupiter and Saturn.

File of correspondence with various individuals concerning chronology, 1872-1906, including W.C.R. Austen on Easter Day 1501; J.D. Parsons on the 'Nevos' cycle; the Revd W. Thompson on days of the weeks of September 1626; J. Jones on the length of the sidereal day; B. Jackson on dates of the new Moon in 29 and 31 AD; J.B. Dimbleby on heliacal risings of Sirius; and a separate section of correspondence, 1898-1900, regarding 1900 not being a leap year.