While practicing medicine in the Harney Valley of southeastern Oregon, Dr. W. L. Marsden became interested in the language of the Northern Paiute Indians. From 1891 until his death in 1913, he collected linguistic material. His principal informant and teacher was "Patotzi", known as Captain Louey or Captain Louey Crook. A member of the Wadatika band of Northern Paiute, Louey was known as a good story-teller among his own people. As the volume of material increased, Marsden turned to the faculty of the Department of Anthropology, University of California - Berkeley, for guidance. Professor A. L. Kroeber was a member of the faculty. In 1914, Professor Kroeber asked Gilbert Natches, a native speaker of Northern Paiute from Pyramid Lake, Nevada, to help him complete Dr. Marsden's work. However, Natches spoke a slightly different dialect than Louey and was, therefore, unable to follow the narrator's style. He did provide his own original data. This publication consists of 59 documents obtained from translations accompanying the texts recorded by Marsden from Louey and by Kroeber from Natches. These documents have been literally translated using the best English possible. Some explanatory notes have been added to some of the translations. The documents include Louey's autobiography, myths, songs, stories, accounts of various Paiute rituals, and religious prayers. (NQ)