Katy Gibbons, English Catholic Exiles in Late Sixteenth-century Paris (Boydell, 2011), p. 79: William Boyd, Calendar State Papers Scotland, vol. 5 (Edinburgh, 1907), p. 219 no. 233: Samuel Jebb, De Vita Et Rebus Gestis Serenissimae Principis Mariae Scotorum, vol. 2 (London, 1725), p. 626: George Lasry, Norbert Biermann, Satoshi Tomokiyo, "Deciphering Mary Stuart’s lost letters from 1578-1584", Cryptologia, 47:2 (February 2023), pp. 49-50. doi:10.1080/01611194.2022.2160677
George Lasry, Norbert Biermann, Satoshi Tomokiyo, "Deciphering Mary Stuart’s lost letters from 1578-1584", Cryptologia 47:2 (February 2023), pp. 6, 65 fn.244, 74, 91 fn.350. doi:10.1080/01611194.2022.2160677