Twenty thousand pounds
Around the World in Eighty Days, by Jules Verne · 2 Oct 1872
At the Reform Club the talk is of the Bank of England robbery, and of how small the world has become. Phileas Fogg says it can be done in eighty days, and bets twenty thousand pounds, half his fortune, that he will do it. He leaves the same evening, from Charing Cross, with his new valet.