The register of deeds shall maintain a separate index for marriage licenses and returns thereto. Each marriage license shall be indexed alphabetically according to the name of the proposed husband and proposed wife. Each index entry shall include, but not be limited to, the full name of the intended husband and wife, the date the marriage ceremony was performed, and the location of the original license and the return thereon. The original license and return shall  be filed and preserved. (1871-2, c. 193, s. 9; Code, s. 1818; 1899, c. 541, s. 3; Rev., s. 2091; C.S., s. 2504; 1963, c. 429; 1967, c. 957, s. 8; 1979, c. 636, s. 1; 1983, c. 699, s. 2.)