Andrew Walker ~1798, Adams Co., PA - 1883 Perry Co. OH, wife Agnes Blakeley, sons Joseph and James

I am seeking information about Andrew Walker, b. ~1798, Adams Co. PA, and d. 1882-83, Perry Co. OH. His wife was Agnes Blakeley ~1798 Adams Co. PA, d. bet 1870 and 1880, Muskingum Co., Ohio. I know of one son, Joseph, who was b. in Adams Co. PA , 1827, d. ~1871 Muskingum Co. OH. They also probably had another son, James S. Walker, b. abt. 1829 in Ohio, who had a son James L. Walker. I would appreciate any information about them, including son Joseph and both Jameses.