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Tyigh Indians. A Shahaptian tribe speaking the Tenino language and formerly occupying the country about Tygh and White rivers in Wasco County, Oregon. They took part in the Wasco treaty of 1855 and are now on the Warm Springs Reservation, Oregon. Their number is not reported, as they are classed under the indiscriminate term “Warm Springs Indians,” but in 1854 they were said to number 500, and in 1859, 450.