25 January 1683 – 31 January 1683

Supped at Sir Joseph Williamson's, where was a select company of our Society, Sir William Petty, Dr. Gale (that learned schoolmaster of St. Paul's), Dr. Whistler, Mr. Hill, etc. The conversation was philosophical and cheerful, on divers considerable questions proposed; as of the hereditary succession of the Roman Emperors; the Pica mentioned in the preface to our Common Prayer, which signifies only the Greek Kalendarium. These were mixed with lighter subjects.