"The extensive works at Dale Hall 
                (or Dale Hole, as it used to be written), founded in 1790 
                originally belonged to Joseph Stubbs - a successful manufacturer 
                of earthenware during the 1822-5 period, who having retired from 
                business, died in 1836. He was succeeded in about 1843 by 
                Messrs. Thomas, John & Joshua Mayer, who from 1855 traded as 
                Mayer Brothers & Elliot, and from them the works passed through 
                the firms of Mayer & Elliot, Liddle, Elliot, & Co., Bates, 
                Elliot & Co., Bates, Walker & Co., and Bates, Gildea & Walker to 
                the firm of Gildea & Walker during the 1881-6 period."
                The marks of 
                Messrs. Mayer were T.J.&J. MAYER; MAYER BROS, etc. Those of the 
                later firms were BATES, WALKER & Co.
                PATENTEES (or other successive changes), on an oval ribbon, with 
                date, etc., of registration inside; and a nude figure kneeling 
                and holding a ewer in front of him, on a tablet with the date 
                1790. 
                This device was 
                introduced in a variety of ways, with the initials B.W. & CO., 
                B.G. & W., or G. & W„ LATE MAYERS, and the name of
                the pattern, etc. On some, the device is surrounded by a 
                circular ribbon, on others by a triangular one. 
                Messrs. Gildea & Walker continued to 1886. The Dale Hall Works 
                were subsequently worked by Keeling & Co. (Ltd.) from 1886 to 
                1936. They used the above mark with the initials K & Co. B."
                Jewitt's "Ceramic Art of Great 
                Britain 1800-1900", 
                
                
                Bates, Walker & Co
                
                BW & Co
                1875-78   
                "BAMBOO" is the pattern name