1750 May 9 (Wednesday). But especially this, which is very warm — the sun burns as in Summer. Finish’d Secret History of Europe Part I, which is volume I.
The editor has not located a record of a work with this title. There are, however, a number of “secret histories” of specific reigns, etc. [Additional note: This may have been John Oldmixon, The Secret History of Europe. Shewing that the Late Greatness of the French Power…Treachery and Corruption of the Ministers Abroad… (London: Printed for the Booksellers of London and Westminster, 1712).]