_Southern group_.--Includes the Navajo, Apache, and Lipan. Engineer José Cortez, one of the earliest authorities on these tribes, writing in 1799, defines the boundaries of the Lipan and Apache as extending north and south from 29° N. to 36° N., and east and west from 99° W. to 114° W.; in other words from central Texas nearly to the Colorado River in Arizona, where they met tribes of the Yuman stock. The Lipan occupied the eastern part of the above territory, extending in Texas from the Comanche country (about Red River) south to the Rio Grande.[19] More recently both Lipan and Apache have gradually moved southward into Mexico where they extend as far as Durango.[20] [Footnote 19: Cortez in Pac. R. R. Rep., 1856, vol. 3, pt. 3, pp. 118, 119.] [Footnote 20: Bartlett, Pers. Narr., 1854; Orozco y Berra, Geog., 1864.] The Navajo, since first known to history, have occupied the country on and south of the San Juan River in northern New Mexico and Arizona and extending into Colorado and Utah. They were surrounded on all sides by the cognate Apache except upon the north, where they meet Shoshonean tribes. PRINCIPAL TRIBES. A. Northern group: B. Pacific group: C. Southern group: Ah-tena. Ătaăkût. Arivaipa. Kaiyuh-khotana. Chasta Costa. Chiricahua. Kcaltana. Chetco. Coyotero. K’naia-khotana. Dakube tede Faraone. Koyukukhotana. (on Applegate Creek). Gileño. Kutchin. Euchre Creek. Jicarilla. Montagnais. Hupâ. Lipan. Montagnards. Kălts’erea tûnnĕ. Llanero. Nagailer. Kenesti or Wailakki. Mescalero. Slave. Kwalhioqua. Mimbreño. Sluacus-tinneh. Kwaʇami. Mogollon. Taculli. Micikqwûtme tûnnĕ. Na-isha. Tahl-tan (1). Mikono tûnnĕ. Navajo. Unakhotana. Owilapsh. Pinal Coyotero. Qwinctûnnetûn. Tchĕkûn. Saiaz. Tchishi. Taltûctun tûde. (on Galice Creek). Tcêmê (Joshuas). Tcĕtlĕstcan tûnnĕ. Terwar. Tlatscanai. Tolowa. Tutu tûnnĕ.