David>Larkin, Wm, and Joseph of SE MO & NE AR

David STAGGS family was in Pulaski Co. IL in 1850; sons Larkin, Joseph, and William moved to SE MO and NE AR.
William STAGGS m Mary Ann DEMENT HURST in July 1869 in Obion Co. TN where her brothers, Cader and James Dement were there in 1870.
Mary's first husband was Albert HURST and they were on the 1860 Greene Co. AR census.
Mary has never been found on the 1870 census. William and Mary died in 1877. Several Hurst children lived to adulthood but cannot be found until later years.Legends said they went to OK or SW MO or NW AR.

Any one know about this family?

Dawn in MO