They were now travelling on the south side of the river, in Oregon, and, after leaving the Pishquitpahs, they encountered the "Wollawollahs," as they called them.

These Indians are now known as the Walla Walla tribe, and their name is given to a river, a town, and a fort of the United States.

In several of the Indian dialects walla means "running water," and when the word is repeated, it diminishes the size of the object; so that Walla Walla means "little running water." Near here the explorers passed the mouth of a river which they called the Youmalolam; it is a curious example of the difficulty of rendering Indian names into English.

The stream is now known as the Umatilla.
Here they found some old acquaintances of whom the journal has this account:-- "Soon after we were joined by seven Wollawollahs, among whom we recognized a chief by the name of Yellept, who had visited us on the nineteenth of October, when we gave him a medal with the promise of a larger one on our return.

He appeared very much pleased at seeing us again, and invited us to remain at his village three or four days, during which he would supply us with the only food they had, and furnish us with horses for our journey.