And the Second Prize Goes To...

Okay, wiseguys: if I asked you who was the richest man in the United States in 1970* 1870, you might well say "Cornelius Vanderbilt"--and by all that I know, that would be correct.   But after Vanderbilt, who was the second richest?  No Googling, now--but I've got you there, haven't I?

I just picked up a plausible answer, reading TJ Stiles' First Tycoon. I admit I had never heard of the guy.  For a quick summary, go here.
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*Thanks, Ken.