The MS was composed, according to a notes in Voltaire’s hand on f.79v, f.81r, f.95v, and f.98r, between 6 November 1759 and 12 February 1760. The notes states that the MS was composed at Les Délices. F.1-80 are written primarily in Wagnière’s hand with corrections by Voltaire. F.81-99 are written primarily in Voltaire’s hand. The first half seems to be a clean copy of the text. The second half appears to be a working document.