§ 72-11-320, MCA
En. Sec. 494, p. 358, L. 1877; re-en. Sec. 494, 2nd Div. Rev. Stat. 1879; re-en. Sec. 494, 2nd Div. Comp. Stat. 1887; re-en. Sec. 1790, Civ. C. 1895; re-en. Sec. 4783, Rev. C. 1907; re-en. Sec. 7036, R.C.M. 1921; Cal. Civ. C. Sec. 1337; Field Civ. C. Sec. 599; re-en. Sec. 7036, R.C.M. 1935; R.C.M. 1947, 91-221.