Wow, I'm glad my question generated such interest!
There is an interesting difference between the two maps. The 1876 Wayne County atlas shows the skewed line between lots 30 and 31 corrected once it gets up to lots 34 and 39. But the 1885 map [[is this also Wayne County atlas?) shows it continues in its skewed direction up there. Was the line adjusted sometime during those 9 years or is one of the maps wrong?
A few other things about the two maps don't match either, like the length of lots 28-33.
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