Editors. "James, Duke of York, is forced by Test Act to resign as Lord High Admiral". The Literary Encyclopedia. First published 01 April 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=16589, accessed 20 April 2014.]
James, Duke of York, brother of Charles II, is forced by the Test Act to retire from his position as Lord High Admiral since he is an acknowledged Catholic. He is replaced by Prince Rupert until 9th July, when Charles takes direct responsibility for the post.