Tad Lincoln is shown to have a great interest in the glass photographic plates of slaves. During the Civil War thousands upon thousands of photos were taken that documented all aspects of the war and such related issues as slavery. When the war was over massive numbers of glass negatives remained. Rather than recognizing their immense historical importance, they were either thrown out or sold for other purposes. One of their most common uses was for the roofs and walls of greenhouses, where the images were quickly destroyed by sunlight.

Film

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