An important book and the next step for those who have enjoyed The Treasury of Early American Homes by Richard Pratt (Whittlesey -- and a BOM dividend book). Much of the same material is used- but the approach is more scholarly, and the purpose primarily historical. This is called, rightfully, the family tree of early American houses, showing how certain phases developed from adaptations of European architectural features to New World requirements and availability. Through excavations and ruins, as well as surviving examples, the characteristics of 17th and 18th century dwellings have been studied, plans redrawn, styles and trends indicated. The material falls into geographical units, - the Southern Colonies, the Delaware Valley and Pennsylvania, the Hudson Valley and Eastern New Jersey, and New England. The emphasis on details and interiors gives one a sense of these dwellings of Colonial American being integral to the human story of our early history. 250 photographs- numerous plans- Bibliography- Glossary and Index add to its substantial reference value.