Principal bound by agent's writings

Any instrument within the scope of his authority, by which an agent intends to bind his principal, does bind him if such intent is plainly inferable from the instrument itself. Source: CivC 1877, § 1373; CL 1887, § 3996; RCivC 1903, § 1692; RC 1919, § 1274; SDC 1939, § 3.0304.