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There are marks inside some of the other small spaces that are parts of the drawing, so it's difficult to tell if it's a coincidence that this resembles a letter. It would not be standard to find a capital-B in block printing during this time period so I'm reserving judgment on it, but it does LOOK like a letter to modern eyes.
There are marks inside some of the other small spaces that are parts of the drawing, so it's difficult to tell if it's a coincidence that this resembles a letter. It would not be standard to find a capital-B in block printing during this time period so I'm reserving judgment on it, but it does LOOK like a letter to modern eyes.

