My wife, Joyce J. Holland, is the daughter of Lucille Aggus, brother of your grandfather, Harry Franklin.I have some information about Ervin, but almost nothing about Mason P.I found him and family in the censuses of 1860 & 1870. He was in Newton Co., MO.Ervin's birth certificate would indicate they were in Jefferson Co., MO in 1850.His oldest son, Isaac J. seems to have been born in MO in 1848.I have nothing on him before that.
The 1860 & 1870 censuses state his wife's name was Mary, born in TN.A Family Group Record compiled by a grandaughter of Ervin states that Mason P. was born in Wales and that his wife's name was Lizea.It doesn't indicate if that was a first or last name.
That's all I have. Do you have any other information?