I have a little more to this line.
Susan M. (7) Duston (b. 10/30/1836 Salem, NH d. 9/30/1885 Mendon, MA?)
David Mark Richardson (3/4/1832 Limington, ME d. ?)
Norman Tillinghast Richardson b. 1854 d. 1924
m. 1881 Martha Isabella Seward b. 1853 d. unk