Britain's Prince William gives a pen to his wife Catherine (R), the Duchess of Cambridge, to sign a visitors' book following a reception at the Parliament House in Canberra on April 24, 2014.  Britain's Prince William, his wife Kate and their son Prince George are on a three-week tour of New Zealand and Australia.     AFP PHOTO / POOL / Saeed KHAN        (Photo credit should read SAEED KHAN/AFP/Getty Images)