Mermaid reports from the 1810s
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 · Martinique · 1819
Witness reports that persons who saw a merman near Diamond Rock on the coast of Martinique gave in a precise description before a notary.

Mermaid · Argyll and Bute, Alba / Scotland · 1811
Witness reports that a mermaid was seen at Kintyre in 1811, with witnesses making affidavit of its movements.