“I had a wild idea of stopping at Holyhead, and not going on to London that day, but I soon saw that that would be plumb foolishness. The only thing was to act as though I’d noticed nothing, and hope for the best. I couldn’t see how they could get me if I was on my guard. One thing I’d done already as a precaution⁠—ripped open the oilskin packet and substituted blank paper, and then sewn it up again. So, if anyone did manage to rob me of it, it wouldn’t matter.

“What to do with the real thing worried me no end. Finally I opened it out flat⁠—there were only two sheets⁠—and laid it between two of the advertisement pages of a magazine. I stuck the two pages together round the edge with some gum off an envelope. I carried the magazine carelessly stuffed into the pocket of my ulster.