As the expedition advanced, however, his agitation increased.

He began to talk wildly and incoherently, and to show manifest symptoms of derangement.
Mr.Crooks now informed his companions that in his desolate wanderings through the Snake River country during the preceding winter, in which he had been accompanied by John Day, the poor fellow's wits had been partially unsettled by the sufferings and horrors through which they had passed, and he doubted whether they had ever been restored to perfect sanity.

It was still hoped that this agitation of spirits might pass away as they proceeded; but, on the contrary, it grew more and more violent.

His comrades endeavored to divert his mind and to draw him into rational conversation, but he only became the more exasperated, uttering wild and incoherent ravings.

The sight of any of the natives put him in an absolute fury, and he would heap on them the most opprobrious epithets; recollecting, no doubt, what he had suffered from Indian robbers.
On the evening of the 2d of July he became absolutely frantic, and attempted to destroy himself.