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Her Imperial Highness Princess Mako of Akishino, the first daughter of His Imperial Highness Prince Akishino in Japan, is shown the Playfair Library in the Old College at at Edinburgh University by Professor Sir Timothy O'Shea Principle and Vice Chancellor at the University. (Photo by Andrew Milligan/PA Images via Getty Images)

Her Imperial Highness Princess Mako of Akishino, the first daughter of His Imperial Highness Prince Akishino in Japan, is shown the Playfair Library in the Old College at at Edinburgh University by Professor Sir Timothy O'Shea Principle and Vice Chancellor at the University.   (Photo by Andrew Milligan/PA Images via Getty Images)

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Her Imperial Highness Princess Mako of Akishino, the first daughter of His Imperial Highness Prince Akishino in Japan, is shown the Playfair Library in the Old College at at Edinburgh University by Professor Sir Timothy O'Shea Principle and Vice Chancellor at the University. (Photo by Andrew Milligan/PA Images via Getty Images)

Her Imperial Highness Princess Mako of Akishino, the first daughter of His Imperial Highness Prince Akishino in Japan, is shown the Playfair Library in the Old College at at Edinburgh University by Professor Sir Timothy O'Shea Principle and Vice Chancellor at the University.   (Photo by Andrew Milligan/PA Images via Getty Images)

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Her Imperial Highness Princess Mako of Akishino, the first daughter of His Imperial Highness Prince Akishino in Japan, is shown the book,The Building of the Old College, in the Playfair Library at Edinburgh University by Professor Sir Timothy O'Shea Principle and Vice Chancellor at the University. (Photo by Andrew Milligan/PA Images via Getty Images)

Her Imperial Highness Princess Mako of Akishino, the first daughter of His Imperial Highness Prince Akishino in Japan, is shown the book,The Building of the Old College, in the Playfair Library at Edinburgh University by Professor Sir Timothy O'Shea Principle and Vice Chancellor at the University.   (Photo by Andrew Milligan/PA Images via Getty Images)

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Her Imperial Highness Princess Mako of Akishino, the first daughter of His Imperial Highness Prince Akishino in Japan, is shown the book,The Building of the Old College, in the Playfair Library at Edinburgh University by Professor Sir Timothy O'Shea Principle and Vice Chancellor at the University (not in picture). (Photo by Andrew Milligan/PA Images via Getty Images)

Her Imperial Highness Princess Mako of Akishino, the first daughter of His Imperial Highness Prince Akishino in Japan, is shown the book,The Building of the Old College, in the Playfair Library at Edinburgh University by Professor Sir Timothy O'Shea Principle and Vice Chancellor at the University (not in picture).   (Photo by Andrew Milligan/PA Images via Getty Images)