Samuel and Anna also had a daughter named Susan B. Campbell, born in 1859. But this is why I'm thinking that Jonathon Sink may be Anna's father, because his wife was Susanah Altick. I also went to the 1870 census and seen your Samuel was living with a John and Liddia Beheler, both 74 years old. I looked up the Elizabeth Dunn he was living with in 1860 and her and her daughter, Martha, were living in the poor house in 1870. I tried looking up the Dunn's on the 1850 census, but could not find them. I also couldn't locate a John and Nancy Campbell on the 1850 census. I did see a John Campbell, but he was still with his parents, just 16 years old. Sounds like there could be a connection between your Campbells and Peter Campbell. I'm not sure I haven't researched Peter's line, I just seen that he married a Lucy in 1809 and was wondering if this could be the parents of the Samuel that I'm researching. If I run across anything that may pertain to your Samuel, I will let you know.