Gerald, thanks for your reply. Since I posted my message I have found some information. You indicated that Samuel died at Ft. Dodge, Webster County. Below is his obit which seems to indcate that his death occurred in Cherokee County, although I don't know what newspaper this was in.
Also, you show Henry's birthdate as 1885 but I think you must mean 1855.
Death of Samuel Foust Another Cherokee County pioneer has gone to his resting place. Samuel Foust died at the residence of his son, W. T. Foust, in this city [Cherokee], on Wednesday, July 3,  at 2:15 p.m.. The deceased had been a resident of this county twenty-six years. He was born in Union County, PA, in September 1817. He lived in Illinois two years, then came to Webster City. He has been in Iowa thirty-five years. His wife died here about eight months ago. Eight children were born to them, five of whom are living - three sons and two daughters. All these are residents of this state except the eldest daughter, Mrs. Wamsley, who lives in the west. The deceased was a great sufferer, his death being the result of paralytic convulsions, but he was conscious at the last and expressed his happiness at the outcome, dying with the hope of one who had lived a good life. The funeral was held from the M.E. Church on Friday morning, the services being conducted by Rev. Jesse Cole, and the remains taken to the Aurelia cemetery for interment.