I found a Last Will and Testament for both John Pope and Hannah Pope at the county Courthouse in Sherman, Texas

John Pope's Will in Book 6, page 484, Jacket #1953, names his wife Hannah, daughter Mary F. Pope and grandchildren Ruby H. and John Norman Pope, children of his deceased son Albert S. Pope. The Will was signed 5 Jan 1902. On the application for Administration of the will, Hannah states that John Pope died in Grayson Co. on 22 Apr 1902.

Hannah Pope's Will is dated 17 May 1916. She gives property (Inventory gives description of property) to Laura Werline, widow of the deceased son, Sidney Pope. Names Grandchildren, John Pope and Ruby Pope Dudley, wife of Welfred R. Dudley. Application to Probate Will, Administrator Laura Werline states that Hannah Pope died in Sherman, Texas on 10 Nov 1918. Hannah's Will is in Book 10, Page 353, Jacket #3987