#1 Clark, Henry, 1952- author of What we found in the sofa and how it saved the world; full name Henry Charles Clark (LC 2012064106)
#2 Clark, Henry C., author of Compass of society (LC 95047953)
#3 Clark, Henry B. (Henry Balsley), 1930- author of The church under Thatcher (LC 50038682)
#4 Clark, Henry, author of The faith and the book; cannot identify with #3.