GEOMETRY. Manuscript on paper, 'Traité de Geometrie a la portée d'un jeune Seigneur, ou l'on donne les preparatifs necessaires aux études de plus grand poids selon la pensée du celebre Platon', in seven books, in French in a neat 18th-century hand, 17 pages and 2 half-pages of hand-coloured figures, the text 182 pages, 4to (contemporary pagination, p.76 repeated), some offsetting of colouring, 20th-century boards.