This series was taken from Masterpieces of Illumination: The World's Most Beautiful Illuminated Manuscripts from 400 to 1600, TASCHEN © 2001

page 187: The Douce Apocalypse, circa 1270.
Origin: London, Westminster Court School

Notice although establishing the traditional baselines for calligraphy, experimentations with inserting smaller sections of text was beginning. A hieracrchy of information is established.