1826 Report of the Committee of Delaware County on the subject of Manufactories, Unimproved Mill Seats, etc. in said county.

This report is arranged by the creeks along which the mills were situated. It gives a detailed view of the area’s former industrial past, providing the amount and worth of products, number of employees and other information for the county’s 158 mills. Streams mentioned include: Cobb’s Creek, Darby Creek, Mukinipates Creek, Crum Creek, Ridley Creek, Chester Creek, Green’s Creek, Marcus Hook Creek, Naaman’s Creek, Buck Run and Brandywine Creek.