The book "Treaty concluded with the Indians of the Six Nations in Philadelphia in July 1742", preceded by a description of the first coalition of the Six Nations, their modern subjects, dependents and allies, reflects an important historical stage in the relations between European settlers and the indigenous peoples of North America. The author details the details of the agreement, important legal aspects and describes the key points of communication between the parties. Readers will be able to better understand the context and meaning of this historical document, which reflects the complex relationship between Indian tribes and European colonists in the 18th century.