1856 94 Canal Street, New Orleans, Louisiana. 1856 Rooms at the Opelousas Varieties, Opelousas, Louisiana.
Clark & Hedrick were listed in an advertisement from September 6 to October 4, 1856 in The Opelousas Courier (Opelousas, Louisiana). Ambrotypes. New Style of Likenesses! Daguerreotypes Superseded!! Ambrotypes are far superior to the ordinary Daguerreotype for many reasons, viz: They are finer and more beautiful; they do not reverse the position, as the Daguerreotype does; they can be seen in any light; they are taken in a much shorter time, therefore the expression is more lifelike.
They can be made double, so as to show two pictures instead of one. They are sealed between two Glasses, and will never fade! There is a softness and a brilliancy in this new style of picture which has never been obtained in the old Daguerreotype process. Persons wishing to see this new style of Picture are invited to call at the rooms of the undersigned at the Opelousas Varieties, where they will remain until the first of October. Clark & Hedrick. Opelousas, Sept., 6th, 1858.
The same advertisement appeared on September 6, 1856 in The Opelousas Patriot (Opelousas, Louisiana).
Clark & Hedrick (John H. Clark & F. S. Hedrick) are not new name but the partnership location in Opelousas, Louisiana is.
 Information from Craig’s Daguerreian Registry.