How can I find the date of a piece of pottery by Pearsons of Cherfield 1810 Made in England? [img size=203]https://kovels.com/media/kunena/attachments/legacy/images/Pearsons.jpg[/img]

I have a stoneware vase with a maker's mark I cannot identify. It looks like a seashell with the letters BH in a box beside it. See picture. [img size=320]https://kovels.com/media/kunena/attachments/legacy/images/Pottery_Jug.jpg[/img]...