1856-1857       477 Broadway, New York, New York.

1856 October 31.  The New York Herald.  (New York, New York.)  October 31, 1856, Whole No. 7367, P. 5.

Knapp’s Colored Improved Durable Ambrotypes and daguerreotypes, 50 cents, including case, twice the size others give for the money, at the only Knapp’s gallery in the city, 477 Broadway, near Wallack’s theatre.  Everybody gets them.  Knapp & Fields.

1856 December 13.  The New York Herald.  (New York, New York.)  December 13, 1856, Whole No. 7410, P. 5.

Knapp’s only Gallery of Ambrotypes, Daguerreotypes and Melainotypes, 477 Broadway.  J. B. Fields, Proprietor.

1857.  New York City Directory.  (New York, New York.)  1857-1858, Published by John Fowler Trow.[1]

Daguerreotypes, 477 Broadway, h—J. C.  (Jersey City, New Jersey.)

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[1] Not listed in the 1855, 1856 or 1858 direcories.