[Berlin, Irving. (1888–1989)] Mackay, Ellin. (d. 1988) [Frissell, Toni. (1907–1988)]. Signed Christmas Card with "White Christmas" Musical Quotation. Printed Christmas Card signed "Ellin and Irving" to the interior by Mackay, longtime wife of the great American songwriter, on behalf of the pair, beneath a printed musical quotation from the most iconic Christmas song of them all.  Quotation includes melody along with the lyrics "May your days be mer-ry and bright- / And may all your Chist-mas-es be white."  Together with an original black and white Frissell photograph of daughters Linda Louise, Mary Ellin, and Elizabeth Irving, originally mounted to front of card, with printed Frissell credit to cover.  Mounting remnants to front cover and verso of photograph, light toning to edges of card, else fine.  Card 4.5 x 6.25 inches (11.4 x 15.9 cm.).