Jean, You and I are from the same family! Your Clark K. Mattison is a brother to my GGrandfather Harlow L. Matteson. You will note these two brothers spelled the last name different. I have lots of information about the family back to NY and am now real close to finding the parents of Clark and Harlow's father Spink Matteson. Have pictures of the grave sites both in Oregon, Il as well as Clark County,IL where Tabitha Wait Matteson is buried. She was Spink's wife and mother of Clark K. and Harlow. My GGrandmother, Maryetta Odell Matteson is buried in the Mattison Plot in Riverside Cemetery, Oregon, IL. with Clark and Sarah, John C and Catherine and their children. Other children of Clark K and Sarah is also buried in the same plot. Why don't you contact me direct by e-mail and we can see what facts you would like to have. You just might have some facts that would be what I am looking for, hopefully.