Updated through online information from T. Daniel Hancock. -- The "American Musical Directory," Thomas Hutchinson, New York, 1861 reports "Size of organ--2 banks keys, 24 stops, 1 octave pedals. Built by E. & G.G. Hook, of Boston."
Identified from company publications as edited and expanded in The Hook Opus List 1829-1935, ed. William T. Van Pelt (Organ Historical Society, 1991).