You didn't give any names or dates for any of the children, so I had to go to the census records and pull the information. Looks like you didn't see the 1880, when Mary was a widow and had another child number 10, Florence.
I needed names and birth dates for children to look for their death records, hoping to find their mother's maiden name.
Name: Richard R. Ward Death date: 13 Jun 1939 Death place: Jollyville, Williamson, Texas Gender: Male Race or color (on document): White Age at death: 85 years 4 months 26 days Estimated birth year: Birth date: 17 Jan 1854 Birth place: Cameron, Texas Marital status: Married Spouse name: Mrs. Charlie Ward Father name: Jacob A. Ward Father birth place: Mississippi Mother name: Mary Smith Mother birth place: Mississippi Occupation: Farmer Residence: Jollyville, Texas Cemetery name: Pond Springs Cem. Burial place: Williamson Co., Texas Burial date: 14 Jun 1939 Additional relatives: Film number: 2118256 Digital GS number: 4030455 Image number: 563 Reference number: film #2118256 Collection: Texas Deaths, 1890-1976 Informant: Willie Ward