Letter, from Henry Justel to Henry Oldenburg Details of the watch which Huygens believes he invented, although this is contested by a clockmaker (mentioned in EL/I1/72); stating that a Jesuit is about to write an account of his observations of Cayenne; questioning the hardness of steel south of the equator; enquiry about whether Japanese narcissus flowers annually in England; concerning political events in Europe; states that he presenting some manuscripts to Oxford university; discussing the work of antiquarians 6 March 1675