I have information for purchasing the "Descendants of Matthias Chitwood" by IO Chitwood. As far as I know there are copies left; the son of the compiler has asked that his name and address not be printed online. Contact me privately at firstname.lastname@example.org
and I will provide further info.
It is a great book, especially for descendants of Capt James and Richard Chitwood--great deal of info. The other children are also well represented. Google "tombaugh" and that should lead you to a full-text copy of one of the other Chitwood books.