Artifacts: Birthday card with sketch, signed by Paul McCartney

From a batch of new Beatles-related items posted at Tracks Auctions:

A birthday card in which Paul McCartney has drawn a picture and written a message circa 1963. Paul has drawn a large picture of an entertainer's face inside the card with a bow tie and written the words 'Keep Smiling'. Below the printed verse Paul has written a message in black pen. It reads, "and if you don't believe a word, of what I've had to say, Happy Birthday, and New Year, and Easter anyway. Paul (McCartney JNR) N.D.O." Paul has also drawn three smiling faces on the flowers on the front of the birthday card. It comes with a letter from the mother of the original recipient. It reads, "This birthday card was sent by Paul McCartney to my daughter Susan Winstanley on her 13th birthday, while she was sick in Broadgreen Hospital at Liverpool". The card measures 15cm x 19.5cm (6 inches x 7.75 inches). The condition of the birthday card is very good.