This is Collins' complete negative. Note the ripples in the image. They appear because the negative itself is deteriorating. Collins used a cellulose diacetate negative film. Over time, that film decays.
Chemical reactions cause the base layer literally to break down.
As this occurs, the base layer buckles and contracts, forming ripples in the film. The process also releases acetic acid, which can migrate to and damage surrounding materials. Because the smell of vinegar permeates decaying acetate film, another name for its decay is Vinegar Syndrome. Librarians, photographers, and preservation professionals in a wide array of fields work to preserve decaying images. Here at the Historical Society, we have begun scanning many of our damaged negatives in order to preserve the images themselves.