1809, Thomas Langdale, A Topographical Dictionary of Yorkshire, page 324:
The NIDD has its rise at the upper-end of Nidderdale, about 3 miles N. E. of Kettlewell; after running a considerable distance from its fountain, enters the earth, by a wide and rocky cavern, called Goydon-Pot-Hole; […]
1808, James Neild, "Mr. Neild's Remarks on Norwich Castle", The Gentleman's Magazine, Volume LXXVIII, Part the Second, August, page 684
In each of the cells a tub is substiuted for an urinal; and on every landing-place are sewers, which from their construction are rendered very offensive. The cells are ventilated by a circular aperture over each door, and likewise by a small pot-hole made in each door.
1811, a UK law quoted in 1820 in The Justice of the Peace, and Parish Officer, volume 5, page 126:
Every officer of excise, from time to time and at all times, shall mark and number every workhouse, pot-chamber, pot-hole, lear, warehouse, room, aud other place whatsoever, entered or used by any maker of flint or of phial glass,
1858, N. S. Vedder, number 877, Design for Radiator Stoves, published in 1858 in the Annual Report of the Commissioner of Patents [of the United States patent Office]:
I claim the ornamental design [...] of the pot-hole frame with its cover; […]
