William Hasell Wilson was a civil engineer for the Reading and Pennsylvania Railroads in the 19th century.
Wilson was the resident engineer in charge for the 1835 Black Rock Tunnel, the second rail road tunnel constructed in the United States, and the oldest tunnel still in use.
His son, Joseph M. Wilson(1838–1902), was also a civil engineer for the Pennsylvania Railroad.[1]
A brief review of railroad history from the earliest period to the year 1894. Allen, Lane & Scott. 1895. pp. 53. http://books.google.com/books?id=AAWGNaNWVrYC.