_Sunday, May 27th._—The rain this morning when we woke, was not pattering upon our tent, but fairly splashing around it, so that we were contented to keep within its covering till noon, when the returning sunshine invited us forth. After riding over to Governor Stevens' to lunch, we went to the Nez Percé camp, where we found they were holding service in one of the largest lodges: two of the chiefs were officiating, one of them delivering an address, (taking the Ten Commandments for his text,) and at the end of each sentence the other chief would repeat it in a louder tone of voice. This is their invariable custom with all their speeches. Everything was conducted with the greatest propriety, and the singing, in which they all joined, had an exceedingly musical effect. There is an odd mixture of this world and the next in some of the Nez Percés,—an equal love for fighting and devotion—the wildest Indian traits with a strictness in some religious rites which might shame those "who profess and call themselves Christians." They have prayers in their lodges every morning and evening—service several times on Sunday—and nothing will induce them on that day to engage in any trading. At an early day the Roman Catholic Missionaries went among them, and as the tribe seemed blessed with a more tractable disposition than most of their brethren, the labors of the Fathers appear to have met with considerable success. A kind of Christianity was introduced among them, strangely altered, indeed, in many respects, to make it harmonize with Indian thoughts and actions, yet still retaining many of the great truths of the faith. It exerted, too, a very perceptible influence over their system of morality. The Methodists, I believe, have more recently added their teaching; so that if the theological creed of the Nez Percés was now investigated, it would probably be an odd system, which would startle an ordinary D.D. After service we rode through the Cayuse camp, but saw no evidence of Sunday there. The young warriors were lounging about their lodges, preparing their arms or taking care of their horses, to be ready for their evening races. The Christianity among these Indians, we suspect, is confined to the Nez Percés.