[Office work map, possibly of construction engineer Sylvester Welch, for Sections Nos. 20-25 of the Allegheny Portage Railroad, generally eastwards along the Little Conemaugh River to Inclined Plane No. 2., c. 1831]. (2 sections)


Information

Attachments

Loading...
For a high-resolution image, please contact the Archives
Current image, reduced-size
Other download options: