Sometime part of Treleigh Wood. Along with Wheal Harmony, operated in tandem to exploit the eastward extension of the main lode of Wheal Tolgus, which runs in an ENE direction through the mining area. According to the Treskerby, Wheal Busy, and Tolgus Mining District map published in 1861 by R. Symons, the spelling of Montague includes an ‘e’.