AmTiquing Trivia:

Herculaneum Pottery of Liverpool

Herculaneum Pottery; Liverpool, Lancashire, England
From 1790 to 1833. One of the most important and progressive of the Liverpool potteries. Founded by Richard Abbey, it passed in 1796 into the hands of Worthington & Co., who called it the Herculaneum Pottery. The earliest mark was HERCULANEUM impressed. The liver, the crest of Liverpool, was used after 1822. Many pitchers with prints in black relating to the history of this country were produced by this company, and date from 1790 to 1825.

1897 A Book of Pottery Marks by W Percival Jervis