Letters would be passed through the women 's circle that Peggy Arnold was a part of , but only Peggy would be aware that some letters contained instructions , written in both code `` and '' invisible ink , that were to be passed on to André , using Stansbury as the courier .
Letters would be passed through the women 's circle that Peggy Arnold was a part of , but only Peggy would be aware that some letters contained instructions written in both code `` and '' invisible ink that were to be passed on to André , using Stansbury as the courier .