Dear Ms. Garza,
Thank you for posting your request on History Hub!
Statewide vital record registration for births, deaths, and marriages began in South Dakota in July 1905. Substitute record sources such as probate records, church records, and newspaper records may include burial location Prior to statehood, probate records were kept by the Territorial Probate Court. We suggest that you contact the South Dakota State Historical Society to inquire about probate records for Ira Royal Hart.
We also suggest that you contact the Minnehaha County Register of Deeds to inquire about any relevant records. The burials may have been at a small family plot instead of a cemetery. The register of deeds also may be able to provide information about the location of the Hart’s property in Minnehaha County in order to locate any possible burials there.
In addition, the FamilySearch Research wiki for South Dakota Vital Records may be useful.
We hope this is helpful. Best of luck with your family research!
Thank you, Cara for your guidance. I appreciate you taking the time to respond. I will certainly use the resources you provided. Blessings!