It's true: it happened in 1799 near the Coalport factory and kilns.
The whole story is told in a long, sad poem in the book "Coalport:
1750-1950" by the famous novelist, Compton Mackenzie.
As a result of an estate sale, I have been asked to auction some books from a private library, including this 1951 1st edition H/C - with its original Coalport "Blue Willow" dustjacket.
Have a look at:
Thanks for looking!
Horatio
P.S. Or - if the link doesn't work - just go to eBay and View Item #3588375932