During 1921 the Academy of Sciences of France awarded a medal and prize to M. W. A. Loth for various important devices having special application to navigation. Among these was mentioned the system of the Câble Guide, which is essentially the system of Pilot Cable invented by Mr C. A. Stevenson, C.E., and described by him in 1893 in the Proceedings of the Royal Society of Edinburgh. In a communication to the Académie des Sciences the Council of the Royal Society of Edinburgh called attention to this fact and to the further fact that apparently no recognition had been given of the pioneer work of Mr Stevenson.