In all cases, necessary expenses consequent upon an injury are a legitimate item in the estimate of damages. (Orig. Code 1863, § 3000; Code 1868, § 3013; Code 1873, § 3068; Code 1882, § 3068; Civil Code 1895, § 3908; Civil Code 1910, § 4505; Code 1933, § 105-2004.)