Mermaid reports from the 1840s
2 cases, best-documented first. Page 1 of 1.
We map claims, not creatures. A case is what some source says someone saw or heard, with the link to that source. It is not proof that anything was there, and a retelling counts once, not as a second sighting.

Mermaid · Village of New York Mills, New York · 1842
Witnesses report seeing a tangible mermaid specimen caught near the Feejee Islands and currently held in New York.

Mermaid · Concord, New Hampshire · 1845
The writer claims to have seen mermaids scrambling up rocks near the Pole and saved two of them.