I have a lot of these, in the standard 4.25 x 6.5 dimensions, and most sport the photographer's name on the bottom or the back.
City Gallery has extensive details on the production of cabinet cards, which were especially popular in the 1880s. Until I see a large set of them all at once, I'm really not sure how to make profitable subsets, so:

Yarmouth NS
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Lynn MA

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Millbury MA

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Salem MA

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Boston MA

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Yarmouth NS

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Boston MA

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