"The Elegant Oakey" 1826-1898.
The link below will take you to the only other known daguerreotype image of the future Mayor of New York, by Mathew Brady, when he was 29 yrs old, in 1855.
Courtesy of the Library of Congress, by Brady
Lc - usz62 - 109931
http://hdl.loc.gov/loc.pnp/cph.3c09931
Carte de Viste of A Oakey Hall by C.D Fredericks in NY
circa 1862 when he was 35 years old
Courtesy of PictureHistory
http://www.picturehistory.com/images/products/1/5/9/prod_15968.jpg