I imagine you are much like Hampden when he lost to Wallace.
Hampden never lost to Wallace. The wager was deemed invalid by a court of law. Please do not present your interpretations of who you
think might have won when it was authoritatively settled. Even Christine Garwood's hit piece,
Flat Earth: the History of an Infamous Idea managed to get this right. I'd encourage you to read at least chapters 3 and 4 before making further libellous remarks about this wager.
Carpenter, the original referee of the debt that both gentlemen agreed on confiding in, had no doubt that the result was in Hampden's favour. Wallace threw a complete shit-fit, which led to many wonderful things such as threatening Carpenter and eventually calling the cops on him to forcibly remove him out of his house. Wallace was so desperate to turn the tables that he changed referees mid-wager to his friend and sports magazine editor, Walsh (n.b. this is not to say that Carpenter had better credentials himself). During the 1876 court case, Walsh was so desperate to defend his illegal actions that he tried to rebrand the entire event as "not a wager". Also, since Walsh and Wallace had previously agreed on Walsh's indemnity, the cost of the whole farce fell on Wallace directly, putting him at a net loss even after all the libel suits he won against Hampden.
It's a sad story, but both men struggled with financial difficulties at the time, so it's no surprise that Wallace would resort to petty cheating (keep in mind that £500 was a very substantial sum of money at the time).