F. J. B . Watson and C. C. Dauterman (The Wrightsman Collection. Volume III. Furniture, Snuffboxes, Silver, Bookbindings, New York, 1970, p. 296) record in their article on Ducrollay: 'On at least two occasions he is mentioned as buying boxes of Oriental lacquer from Lazare Duvaux (Livre-Journal, December 17, 1750, no. 680, and a much larger quantity on October 4, 1752, no. 1225). These were unquestionably intended to be cut up and mounted en cage as gold boxes.' Considering that the date-letter 'K' on the present notebook corresponded to the rather exceptionally long period from 15 July 1750 to 22 January 1752, it is tempting to suggest that the present two lacquer panels originate from Duvaux's 17 December 1750 supply.