当观众得知汽船设计者企图，带着妻子进行这次水上旅行时，从匹兹堡到整个莫农加希拉河流域激动和惊恐的情绪传播开去。
When the spectators learned that the builder of the boat intended to take his wife along on the trip , excitement and scandalized alarm spread through Pittsburgh and up the valley of the Monongahela .
莫农加希拉河