[1] One of their number, Klattasine or Klatsassan, led a party of warriors to attack a crew building a gold-rush era route known as Waddington's Road in the Homathko's canyons, which was the opening round of the Chilcotin War of 1864.

Relief troops, including the governor of the colony's own party and escort, came to the Chilcotin via Tatlayoko Lake.

The first comprehensive map of British Columbia was produced under the authority of Joseph Trutch, and was published in 1871.

[3] Maps of British Columbia published in the 1880s and 1890s continued to use minor variations of Tatlahco Lake,[4] while many geological publications used Dawson's spelling of Tatlayoco.

[8] They were only aware of Dawson's spelling of Tatlayoco, which they adopted as the official name in 1911, after changing the hard "c" to a "k".