It seems to me that the customary way to fix a fight was to make a cash payment to the boxer who was supposed to lose. In Hemingway's story the gamblers ask Jack Brennan to give them $50,000 in advance. Then when he loses he is supposed to receive $75,000, that is, his $50,000 plus $25,000. If they are bribing him to lose the fight, why should he have to put up $50,000 of his own money? I don't see anything "logical" about this or anything "usual." It is certainly not "usual." It is very un-usual. Jack should be very suspicious when they ask him to turn over $50,000 of his own money to them. Why wouldn't he ask them, "If you want me to take a dive for $25,000, give me the $25,000 and I'll agree to take the dive"? If Jack wants to bet against himself he doesn't have to make some deal with these two gamblers; he ought to be able to have his manager place the bet with any bookies in New York. Instead of trusting them to pay him $25,000 if he loses to Walcott, he is trusting them to pay him $75,000 if he loses to Walcott.