[Letter] 1700 Jun 6, The Observatory [to] Rev. John Smith, Rector of Gate Burton, Lincolnshire/John Flamsteed, [re position of Earth's perihelion at the time of the Deluge, etc.; states belief, based on twenty years of his observations of Mercury and Mars, that Earth's aphelion "is carried forward... annually... under the fixed stars"; argues for a date for the Deluge earlier by a century than that suggested by Whiston; condemns Whiston's theory [of the Deluge] in general.]