One who grants a thing is presumed to grant also whatever is essential to its use.
§ 1-3-213, MCA
En. Sec. 4613, Civ. C. 1895; re-en. Sec. 6190, Rev. C. 1907; re-en. Sec. 8751, R.C.M. 1921; Cal. Civ. C. Sec. 3522; Field Civ. C. Sec. 1977; re-en. Sec. 8751, R.C.M. 1935; R.C.M. 1947, 49-114.