Bring someone who is fascinated by Civil War history in general, I found this to be not only informative but a small source of entertainment.  Before this was written, I had no idea that some of the pictures had been - in essence - stolen by Brady.  While it is terrible to take credit for someone else's work, I still feel that these pictures are indeed worthy of preservation.  Despite Brady's minor deceit, he helped to chronicle one of the bloodiest and most influential wars in American history.  
While it is not of great importance, I am curious as to your "moral" view with regards to Brady's lie via omission.