Dowling’s Block at 337-339 High Street. It is also called the Wing’s Block. Dowling is a milliner.
Sanborn map analysis:
Sanborn 1884 map shows an empty lot
Sanborn 1889 map shows a 4 floor building
Sanborn 1895 map shows a 4 floor building
Sanborn 1915 map shows a 4 floor building
Sanborn 1949 map shows that it is 1 floor
Sanborn 1956 map shows that it is 1 floor