That a new history of the United States is needed, extending from the discovery down to the present time, hardly needs statement. No such comprehensive work by a competent writer is now in existence. Individual writers have treated only limited chronological fields. Meantime there, is a rapid increase of published sources and of serviceable monographs based on material hitherto unused. On the one side there is a necessity for an intelligent summarizing of the present knowledge of American history by trained specialists; on the other hand there is need of a complete work, written in untechnical style, which shall serve for the instruction and the entertainment.