Albert and Hester Pringle Mason

Looking for information on Albert and Hester Mason.
They came from Tama Iowa and they followed there son to York Nebraska his name is George Gilbert . One of his sisters also came with the parents a Nettie or Lettie Mason also born in Tama Iowa.One of the girls family say married a Sam Kerwood.Not Sam Garfield Kerwood I think he married a Charolete Mason from Logan Iowa. My family came from Tama Iowa.Albert and Hester came from Indiana and she from Canada.Alberts father was Aaron fron New York to Indiana.Any information would be great.
Albert and Hester are buried at Greenwood Cemetery in York. I have a picture of there grave sitesfrom a very nice lady in York.