After the war Sir William retired to his estates, where, on the site of the present Johnstown, he built his residence, Johnson Hall, and lived in all the style of an English baron.
He died at Johnstown, N.Y., on the 11th of July 1774.
Gloversville and Johnstown are noted for leather gloves and mittens.
Nearly 20% of the iron and steel was produced by Pittsburg together with Allegheny,with which it has since been consolidated, and the production of these is the leading industry of New Castle, Johnstown, Duquesne, McKeesport, Sharon, Braddock and Dubois, also in the west part of the state and of Reading, Harrisburg, Steelton, South Bethlehem, Pottstown, Lebanon, Phoenixville and Danville in the east part.
Work was begun on the system in 1826 and was continued without interruption until 1840, when the completed or nearly completed portions embraced a railway from Philadelphia to Columbia on the Susquehanna, a canal up the Susquehanna and the Juniata from Columbia to Hollidaysburg, a portage railway from Hollidaysburg through Blair's Gap in the Alleghany Front to Johnstown on the Conemaugh river, a canal down the Conemaugh, Kiskiminetas, and Allegheny rivers to Pittsburg, a canal up the Susquehanna and its west branch from the mouth of the Juniata to Farrandsville, in Clinton county, a canal up the Susquehanna and its north branch from Northumberland nearly to the New York border, and a canal up the Delaware river from Bristol to the mouth of the Lehigh; considerable work had also been done on two canals to connect the Ohio river with Lake Erie.