Just a clarification
The vignette process has clearly been mistaken for photo degradation. Vignette was used to make the center pieces of the pose, In this case the team, stand out, rather than the back ground. It was a very common practice in the mid 19th century especially by this photographer. Mr. Messier will be the deciding factor on this because as a scientific expert on 19th century photography there is no way to rule his results(good or bad) as inconclusive. His findings either combined with sgc or aside from sgc will be the final verdict on this card.
Troy
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