I think I'd heard about him in history class, but I was reading into some of his, you know, business ventures back in the day, and he made a killing doing, like, speculative investments in railroad stock back when that was hot.

我想我在历史课上听说过他，但我正在读他的一些，你知道的，当时的商业冒险，他在铁路股票的投机性投资中赚了大钱， 当时很火热。