I subsequently discovered the info below. While the passenger's destination was Boston, the ship, SS Canada, must have stopped at New York. Hence I could never find record at Boston.
New York, Passenger Lists, 1820-1957
Name: B Gorman
Arrival Date: 16 May 1883
Birth Date: abt 1864
Age: 19
Gender: Male
Ethnicity/ Nationality: Irish
Place of Origin: Ireland
Port of Departure: London, England
Destination: Boston, Massachusetts
Port of Arrival: New York, New York
Ship Name: Canada
Source Citation: Year: /1883/; Arrival: /New York, New York/; Microfilm
Serial: /M237, 1820-1897/; Microfilm Roll: /Roll 465/; Line: /46/; List
Number: /587/