It has been a long time since I have done any Thompson genealogy. I never got much response when I tried to post before. I am also descended from William B. and Lousa Meader. Charles Coffin Thompson was brother to my great grandfather George Haviland "Howland" Thompson and Flora Florence Isador Felker. I have Charles Coffin Thomspon in the 1860 census in Muscatine, Iowa.