Editors. "Death of William IV of Holland". The Literary Encyclopedia. First published 01 April 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=17592, accessed 20 December 2013.]
On death of William IV of Holland, his widow Anne, sister of George II, acts as Regent for the infant heir William, who is only three years old. She proves to be only the first of many regents, since she herself dies in 1759 when her son is still only ten.