Corrected link from photograph and revised information about photographers

Ed noticed that the page for "Walt Whitman by Frank P. Harned, ca. 1886 - ca. 1887" (zzz.00096) linked to an old version of our "Notes on Whitman's Photographers." He also provided updated information about the Edy Brothers, which I have incorporated into that page.

~ Brett

Added National Archives to list of public domain repositories for images

A couple of the images in the gallery are from the National Archives, and one can reproduce them without seeking permissions, so I've added that information to the list of similar repositories (viz., Library of Congress, Gay Wilson Allen Collection, and Ed Folsom Collection) in the FAQ.

~ Brett

Another typo fixed

I have corrected another typo that Ken spotted in the "Credit" section of the caption to one of our Whitman images (http://whitmanarchive.org/multimedia/image122b.html?sort=year&order=ascending&page=13). The line now correctly reads " Hirshhorn Museum."

--Vanessa