The United States Government building (the old stone Post Office) was located at Chillicothe Street at the northeast corner of the Gallia Street Esplanade.
The RR YMCA was built in 1908 and was located at the corner of Gallia and Norfolk Streets…
The top photo is the machine shop, location unknown.
The lower photo, the Foundry of the Portsmouth Machine and Casting Company was at 401 Third (3rd) Street on the southwest corner of Jefferson Street. This building is now PCL Building Supplies.
The Breece Manufacturing Company produced veneer tops, panels, table rims, and wheel stock. The office and the mills were both located in Eastern Portsmouth.