Many talented artists worked for Rookwood Pottery, and a number of pieces are marked on the base with an artist's cipher (their name or initials) in addition to the reverse RP logo.
Some pieces were also marked with a letter: "P" indicates soft porcelain; "S" indicates a special piece; "Z" refers to matte glaze; "V" indicates Vellum glaze, and trial pieces were marked "T".
