The Psalter includes eight large finely painted initials that are hitherto unknown examples of the work of an artist known as the Master of Edward IV. The Master of Edward IV was first identified by art historian Friedrich Winkler in 1915 and named by him after two volumes of a Bible historiale produced for Edward IV in 1479, now in the British Library (Royal MS 18 D ix and Royal MS 18 D x). Subsequently, the Master of Edward IV was credited with the illustration of many other manuscripts ranging in date from the 1470s to 1500. A study by Bodo Brinkmann in 1997 attributed forty-seven manuscripts and twenty separate leaves to him. blogs.bl.uk
Richard III Society 