(could this be my guy?)
New York, 1820-1850 Passenger and Immigration Lists
Name: W. Keith
Arrival Date: Aug 2, 1824
Age: 29
Gender: M
Port of Arrival: New York
Port of Departure: Havana
Place of Origin: Great Britain
Occupation: Merchant
Destination: Great Britain
Ship: Ship Robert Fulton
Microfilm Serial Number: M237
Microfilm Roll Number: 5
List Number: 424
Source Information:
Ancestry.com. New York, 1820-1850 Passenger and Immigration Lists [database online]. Provo, Utah: MyFamily.com, Inc., 2003. Original data: New York. Registers of Vessels Arriving at the Port of New York from Foreign Ports, 1789-1919. Micropublication M237, rolls # 1-95. National Archives, Washington, D.C.