The very beginning of this affair, which involved me, before I was aware of it, in as much villainy and wickedness as ever man heard of, was, of course, that spring evening, now ten years ago, whereon I looked out of my mother's front parlour window in the main street of Berwick-upon-Tweed and saw, standing right before the house, a man who had a black patch over his left eye, an old plaid thrown loosely round his shoulders, and in his right hand a stout stick and an old-fashioned carpet-bag. He caught sight of me as I caught sight of him, and he stirred, and made at once for our door.