The present Dictionary contains the lexical portion of an Oregonian language never before reduced to writing. The Klamath or Máklaks language is spoken in two dialects, that of the Klamath Lake Indians, or É-ukshikni, and that of the Modocs. No obstacle prevented the gathering of the terms of bot dialects into one and the same word-list, because the dialects differ but slightly, though more in their lexical than in their grammatical forms. But aside from these minor discrepancies of speech, it would be wrong to suppose that the language of the Klamath Lake Indians, or that of the Modoc Indians is entirely homogenous within itself. Every class or cluster, band or settlement of Indians has a few terms peculiar to itself, or some words used in other acceptations than observed among its neighbors (re-edition; originally published 1890, Washington, written in English).