SDCL § 7-9-9: Alphabetical indexes of instruments affecting real property.

In addition to the numerical indexes required by § 7-9-8, there shall be kept one index of the deeds, contracts, and other instruments, not liens merely, and another of the mortgages and other instruments which are liens affecting title to real property, which indexes shall show the names of the grantors and grantees, dates of instruments, dates of filing, and description of property affected.