'The mystery to me is,' said Dunbar, 'how Purvis, as you call him (to me, of course, he is E. W. Smith), could have got hold of this box of papers. It may be a fraud yet,' he said truculently, 'and it will require investigation.'
'I know my mother's writing,' said Peter, 'and Purvis was in the act of trying to burn the box before we took him off the steamer. It is the last thing in the world that it would suit him to have about him if he meant to establish his claim to be the heir.'
'That's so,' said Dunbar thoughtfully.
'The box could not have come out with him when he sailed to Argentine as a child,' said Peter, 'because the letter is dated long after that.'
'And you say you never saw the man until you met him out here?' Dunbar went on.
He brought out a notebook from his pocket and began to jot down Peter's replies.
'No,' said Peter, 'or, if I did, I can't recall where it was. At first when I saw him he reminded me of some one whom I had met; but afterwards, when it seemed pretty well established that he was my brother, both Christopherson and I thought that this vague recollection of the man, which I mentioned to him, might be based on the fact that there was some sort of likeness between him and some members of my family.'
Dunbar jotted this down also. 'And you positively have no recollection of having seen him?' he said, as he fastened a band of elastic round the book. 'If that is so he must have had accomplices in England who stole the box for him. I shall have to find out where these boxes were kept at your home, and, as nearly as possible, I must discover with whom Purvis was in communication in England. Or he may have gone there himself. I know that he went home in one of Lamport & Holt's boats only a few months ago—that was after the wreck of the Rosana, you understand—and it was while he was in England that I saw him, and knew for certain that he had not gone down in the wreck. My warrant against him is for a common hotel robbery. It was when he came back to Argentine that he began this river-trading, which was in the hands of a better man till he took it.'
'The plan will be for you and my lawyer to work together,' said Peter; 'but at present I can't furnish you with the smallest clue as to how these papers came into his possession. I know the look of the box quite well. There were several of them in my mother's writing-room, which was in the oldest part of the house. They were all destroyed one night last autumn when we had rather a serious fire there.'
Dunbar took out his notebook and began to write.