One of Jane Austen's novels ('Emma') is dedicated to the Prince Regent. He was a great admirer of her novels, and she was invited, via the royal librarian, to dedicate a book to him. Unfortunately, the admiration was not reciprocated, but she did not feel able to decline the invitation, which is, accordingly, far less fulsomely worded than the one you quote, Mark; though she maintains the fiction that it is 'by Royal permission'. (Click on the link below and then on 'the dedication' to see the exact wording.) One wonders how many authors who apparently dedicated their books to members of the Royal Family 'by permission' were actually nudged in that direction by an invitation via the librarian. I suppose if you really had the urge to offer a dedication, you could approach the King through 'the usual channels'.
http://www.austen.com/emma/