Each recorder shall keep an assignment record and index thereof. There shall be recorded in such record the assignment of all mortgages and other instruments which are by law recorded in his or her office.

12 Del. Laws, c. 110; Code 1915, § 1375; Code 1935, § 1547; 9 Del. C. 1953, § 9608; 70 Del. Laws, c. 186, § 1