The Book of the White Earl is an Irish religious and literary miscellany created circa 1404–1452.
MS 610, consists of twelve folios inserted into Leabhar na Rátha, aka The Book of Pottlerath.
The foliage pattern is probably inspired by foreign models, but is so completely integrated that the borrowing is only realised on second thoughts.
The initials are large, bold, and drawn in firm lines and bright colours.Butler is admired for having been strongly Gaelicised.
He was an Irish-speaker and seems to have been the very first of the Anglo-Irish lords to appoint a brehon, Domhnall Mac Flannachadha, for his service.