Note 271 — ESSAYS. (continued 3)

The work of Theophilus was composed certainly not later than A. D. 1000, probably earlier; that of Heraclius, de Artibus Romanorum, was written about the same period. Raspe published Theophilus under the title of “Theophilus Monacus de omni scientia artis pingendi, e codice manuscripto Collegii Trinitatis Cantabrigiensis.”