The shape of metal fittings, the length of the rope and the way the floor opens are similar to those devised by William Marwood, who served as executioner in England in those days, so it is possible that his method was used as a guide for preparing the Scheme.
この当時にイギリスの死刑執行人を務めていたウィリアム・マーウッドが考案した物と金具の形状やロープの長さ、床の開き方などが酷似しており、参考にされた可能性が考えられる。