Arminta's sons' birth records are listed on the WV cultures site. Charles is listed as C.S. Solesberry born 22 Dec 1889. Levi's birth is 10 June 1892.
Arminta's death certificate is listed as Mintie Lilly 30 Aug 1929. Information was given by a Jack Bolen who was her daugther Fannie's first husband.
Hope this helps you. Let me know if you find anything on the Martha I'm hunting.