2018-10-01 19:11:59 UTC
Etymology: probably from (per an old Cornish manuscript, as Moeshayle) a small river that runs through it Mo(w)es (young woman) & Hayle (river). Alternatively, from a now-collapsed cavern called Mouse Hole.
Old Cornish Rhyme:
I would that I were where I wish,
Out on the sea in a wooden dish,
But if that dish begins to fill,
I'd wish I were on Mousehole Hill.