Walt Disney signed mat, housing a large ''Alice in Wonderland'' cel of the Mad Hatter. Disney inscribes the mat in brown wax crayon, ''To Roberta / Best Wishes / Walt Disney'', possibly dedicated to Disney actress Roberta Shore. Official Disney mat is framed to a size of 15.25'' x 17.25'' with Disney label on verso confirming cel's screen-use. Cel and background measure 8'' x 9.5''. Discreet soiling to mat at lower left, otherwise near fine. Cel remains in near fine condition. With Phil Sears COA.