Maine
Castine harbor flats
Tidal mudflat Inferred from historyPermission required
What you could find
Reported finds from this shoreline.
Sea potteryPhotos via Wikimedia Commons: NPS (Public domain).
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Why this spot
18th-19th c port (British/Loyalist era too)
Same inference; oldest-era upside in Maine.
Keep exploring nearby
More spots in this area.