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to a stranger, which has come into his possession by accident. He even has two watches, one to suit either character. Thus, you see, he can be Brotherhood or Davenant at will, by slipping on a wig and a pair of spectacles.
"He did not do anything so crude as to change once for all, suddenly, from Brotherhood to Davenant at a given point on his journey. He alternated between the two rôles all along the line—I have always wondered what is the origin of that curious phrase 'all along the line'; here I use it, you will understand, in a quite literal sense. Davenant got out at Paston Oatvile—the porter saw him. But, as we now know, it must have been Brotherhood who was travelling in the 4.50 from Paston Oatvile on. Yet it was as Davenant that he would have got out at Paston Whitchurch."
"How do you know that?" asked Reeves.
"The ticket, of course. Brotherhood had a season, naturally, for he went up and down every day. At Paston Whitchurch, therefore, Brotherhood would have produced a season. It was Davenant who needed an ordinary single. The effect of all this was to create the simultaneous impression that both Brotherhood and Davenant came back to Paston Whitchurch that afternoon, and came by the same train. There was only one hitch in the plan, which could hardly have been foreseen. If Brotherhood happened to be murdered on the way, it would look very much as if Davenant had mur-