Papers of the Winthrop Family, Volume 3
1635-03-06
Herinclosed I send you a casement through which I thinke you may much more securely impart your minde then any other way; you will finde at euery corner of the paper a little noch of this length ——, you must cause those noches to bee iust putt on those due places on the letter I haue written; and then you may reade my secrett minde;2 the rest being
190
I pray present my seruis to mr. Hall I thanke you vnfeignedly for vsing my horse, butt I take itt vnkindly (if I could doe soe, any thing that you doe) that you made not vse of the other allsoe for Mr. Hall; I pray send my coate hatt etc. by the fyrst.
W. 12. 9.
The “casement” used by Clotworthy and Winthrop is a sheet of paper 7½ inches by 11 3/8 inches, with rectangular slits of varying lengths cut in such a way that when the “casement” is superimposed on the letter, only those words constituting the message can be read through the openings. The results obtained by the use of this device can be seen from the illustration facing this page.