I decided also to revive the old idea of mining a train. Something more vigorous and certain than automatic mines was indicated, and I had imagined a direct firing, by electricity, of a charge under the locomotive. The British sappers encouraged me to try, especially General Wright, the chief engineer in Egypt, whose experience took a sporting interest in my irregularities. He sent me the recommended tools: an exploder and some insulated cable. With them I went on board H.M.S. Humber , our new guardship, and introduced myself to Captain Snagge, in command.