Well, the brothers, chatting along, happened to get to wondering what might be the fate of a perfectly honest and intelligent stranger who should be turned adrift in London without a friend, and with no money but that million-pound bank-note, and no way to account for his being in possession of it. Brother A said he would starve to death; Brother B said he wouldn't.
Brother A said he couldn't offer it at a bank or anywhere else, because he would be arrested on the spot. So they went on disputing till Brother B said he would bet twenty thousand pounds that the man would live thirty days, anyway, on that million, and keep out of jail, too. Brother A took him up. Brother B went down to the Bank and bought that note. Just like an Englishman, you see - pluck to the backbone. Then he dictated a letter, which one of his clerks wrote out in a beautiful round hand, and then the two brothers sat at the window a whole day watching for the right man to give it to.
They saw many honest faces go by that were not intelligent enough; many that were intelligent, but not honest enough; many that were both, but the possessors were not poor enough, or, if poor enough, were not strangers. There was always a defect, until I came along; but they agreed that I filled the bill all around; so they elected me unanimously, and there I was now waiting to know why I was called in.
Account for: explain
Disputing: disagreeing strongly Took him up: accepted a challenge Pluck: brave with initiative
Defect: something which spoils the rest Unanimous: without anyone disagreeing