This settlement was on the northern end of Beaver Lake, which is northeast of Williams Lake in the Cariboo region of central BC. BCGNIS notes that a post office was established there in 1906 and it closed in 1933.1
During the Cariboo gold-rush years it was part of a supply chain by which packers brought supplies as far as Beaver Lake on mules, then transferred to horses for the last 20 miles to the Forks, a gold-camp near Quesnel.2
In this despatch from 1862, Douglas asks Newcastle to call the attention of agriculturists to the price of grain at Williams and Beaver Lake—i.e. 10d a lb for Oats and 1s/3d & 1s/6d a lb for Barley.
1. Beaver Lake,BC Geographical Names Information System.