I first heard of Clerihews in the Times crossword: The Clerihew is:
a whimsical, four-line biographical poem invented by Edmund Clerihew Bentley.
The reason it's relevant to this plaque on a house just around the corner from mine is that the very first Clerihew was written about Sir Humphry Davy:
Sir Humphry Davy
Abominated gravy.
He lived in the odium
Of having discovered sodium.
(Sir Humphry is indeed credited with having been the first to isolate sodium, six years after moving out of this house...)
GPS Coordinates:
51.45124, -2.62012
Location: Hotwells
