Maybe the Hansom cab driver was having a bad night. Or he was a crook. Or he honestly didn't know how to do multiplication. At any rate, his attempt to cheat businessman Harry Allen had the most unexpected results. The obliteration of the Hansom cab business. In Episode 062, Out Of My Mind podcast host Jay Douglas tells the story of James Hansom, inventor of the two-wheel, horse-drawn cab, businessman Harry Allen and that fateful night that put Allen in the cab business and the Hansom cabs out of it.