Journal of Samuel Maclay

The Journal of Samuel Maclay, Volume 1, provides a detailed historical account of a 1790 surveying expedition in northwestern Pennsylvania. Commissioned by the Supreme Executive Council of Pennsylvania, Maclay explored the New Purchase region, documenting the headwaters of the Allegheny, Sinnemahoning, and Susquehanna Rivers. This work of history and biography records five months of travel ending in the Kishacoquillas Valley.

As a primary source for state and local history, this travel narrative describes the physical landscape and cultural environment between the American Revolution and the turn of the century. The text focuses on the technical aspects of surveying and the daily realities of exploration in the Middle Atlantic region. Through personal interjections and observations of nature and river systems, this literary collection establishes the broader context of early American expansion.