John J. Hennessy, chief historian and chief of interpretation at Fredericksburg and Spotsylvania National Military Park, began his career with the National Park Service at Manassas NB a very long time ago. He is the author of dozens of articles and essays and of three three books, For the past 24 years, his ofice has been at historic Chatham. His topic tonight:  The Fitzhughs and Chatham.