 Just as the Early and Interim Accounts include a corresponding classification of sign types, Peirce’s final account holds similar typological ambitions. Peirce states explicitly that there are sixty-six classes of sign in his final typology. (See EP2. 481). Strictly speaking, the six elements that we have detailed yield only twenty eight sign types, but we are interested in Peirce’s very final typology. He believes that we can obtain these sixty-six classes, rather in the manner of the 1903 typology, by identifying ten elements of signs and signification, each of which has three qualifying classes, and then working out their permissible combinations. These ten elements include the six sign elements identified above, plus four other elements that focus on the relation between signs, objects and interpretants. The ten elements and their respective sign types, taken from Peirce’s 1908 letters to Lady Welby (EP2 483–491), then, are as follows: