I don't know, probably. This kind of thing all goes together and you tend to become very bitter towards people.

Yes, he was in Europe at the time. Chernow's biography of Clemens, while ridiculously long (audiobook was > 40 hours) was also very good and spent quite a bit of time on this.

I do suspect financial losses were a big contributor -- but part of it wasn't just that he lost _his_ money, but also his wife's inheritance. Of course, even aside from this money-losing invention, they were quite the profligate spenders.