George Mashburn, Mary Jesse Biggs

I have a family mystery I need to solve. George N? Mashburn and Mary Jesse Biggs were married 9/13/1880. Mary then married seven years later to Julian Imbeau on 9/4/1887. The McPherson Cemetary listings in Saline Co. Arkansas have two tombstone listings for Mary one listing her as W/O George Mashburn and one as wife of Julian Imbeau. Same death and birthdates. I can not find any records of George and need to know where he was buried ect. Did Mary and George have any children? Mary and Julian had a daughter Sarah Catherine Imbeau who married Tyndale Meeks Nelms this is my husbands family line. I have alot of info on the Nelms side but this has got me stumped. Any help would be appreciated.