A. W. Franks, “Notice of Permission given at Paris to John Acheson to make Dies with the Portrait of Mary Queen of Scots, 21st October 1553, and to Nicolas Emery to make a Die for Jettons, with the Arms, &c., of the Queen of Scots, from a Register preserved at Paris”, PSAS, vol. 9, pp. 506–507, Nov. 1873.