Re: "Great shots of Mott Haven." The building with the arched windows is the Bronx GPO at 149th St. & Grand Concourse.
The NYCRR & PRR tugs were unique in NY harbor. They had tall stacks & wheel houses. The other railroads involved in lighterage and car floats in NY had much shorter stacks and wheelhouses because they had terminals along the Harlem River in the Bronx and there was low clearance under the bridges from Manhattan to the Bronx