The Trans-Allegheny Region, which is located in the northeastern portion of the United States, is an area that includes the Allegheny Mountains (part of the Appalachians) which stretch from Pennsylvania down through Maryland, West Virginia and Virginia. At the time this work was published in 1912, the authors, Alvord and Bidgood, lamented in their "Preface," that, "After the brilliant researches of Francis Parkman and Justin Winsor, it is remarkable that a new chapter in the history of the explorations of North America has remained so long unwritten; yet the story of the discovery of the...