Seth Bullock's daughter, Floy Bullock, would marry into the Kellar family.

Seth Bullock's grandson, Kenneth C. Kellar and Homestake Story

Kenneth C. Kellar, son of Floy Bullock Kellar, penned "Seth Bullock Frontier Marshal" 1972, a honest tribute to the life of his grandfather from a family perspective. Holding true to family values, Mr. Kellar entered the political arena and as well served as the Director and Vice-President of the Homestake Mining Company. He died in 1982 and is interred at the Lead Cemetery, South Dakota.