"Our boys went over to the battle field after trophies and got any quantity of love letters gutta percha cloths minnatures (sic - I'm guessing "miniatures"

etc. One Negro"
Looked up "gutta percha" and came up with this definition: Gutta-percha l was one of the first plastic materials. It was made from a mixture of resins from Malaysian trees. It was molded and used for daguerreotype cases, toilet articles, and picture frames in the nineteenth century.
Read more:
http://www.kovels.com/priceguide/kovels_gutta-percha/
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Great letter - thanks for sharing!
Mamahen