I don't know whether this link will allow you to see the article, so I'll provide some quotes:
Wallace had enraged Hampden in March 1870 by claiming victory in a £500 wager to provide proof of the earth's rotundity. Notoriously, Hampden publicly declared that the earth was a flat, circular disk surrounded by ice
Wallace was to rue the decision to engage a crank until the end of his life. Hampden followed him with letters, "documents" etc. the rest of his life.
Wallace later realised to his cost that 'paradoxers can never be convinced' .
'Paradoxers' only follow you with more and more of what seems true to them and never give up. Do not enter any debate with them. They believe in winning an argument by the quantity of material they collect.