Others, without ascending to the first ages of the church, have asserted that oil painting was known out of Italy, at least as early as the eleventh century. As a proof of this, they adduce a manuscript of the Monk Teofilo or Ruggiero, no later back than that period, which bears title, "De omni scientiâ artis pingendi," where there is a receipt for the preparation and use of oil from flax.[75] Lessing gave an account of this manuscript in the year 1774, in a treatise published at Brunswick, where he filled the office of librarian to the Prince. Morelli, also, in the Codici Naniani (cod. 39); and more at length Raspe, in his critical "Dissertation on Oil Painting," published in the English language at London, in which he enumerated the existing copies in various libraries, and gave a great part of the manuscript, entered into an examination of the subject. Lastly, Teofilo's treatise is inserted by Christiano Leist, in Lessing's collection, "Zur Geschichte unde Litteratur." Brusw. 1781. The Dottore Aglietti, in his Giornale Veneto, December, 1793, likewise adds his opinion; while the learned Abbate Morelli, in his "Notizia," which is often cited by me in the emendation and illustration of this edition, throws the greatest light upon the present question, agitated by so many, and, we may add, "rem acu tetigit." He, then, will be found to concede to Giovanni, whom he calls Gianes da Brugia, the boast of this great discovery, agreeing with Vasari, though in a different sense from that in which the latter writer views it. For he does not reply to his opponents, that the art of painting, as taught by Teofilo, might have gone into disuse, and was only revived by Giovanni; whence Vasari ventured to commend him as an original inventor; in the same manner as Tiraboschi replied, who followed the Roman anthologists (St. Lett. t. vi. p. 1202). Neither does he bring forward the defence advanced by the Baron de Budberg in the apology of Gio. da Bruges,[76] to the purport that Teofilo taught the art of painting in oil, only upon a ground, without figures, and without ornaments: because Teofilo, in chap. 22, whose words we have given in the note, likewise taught this art. Into what, then, does the long-boasted invention of Giovanni resolve itself? Nothing more than this: according to the ancient practice, a fresh colour was never added to the panel until the first covering had been dried in the sun: a mode, as Teofilo confesses, infinitely tedious: "quod in imaginibus diuturnum et tædiosum nimis est;" (cap. 23); to which I may add, that the colours in this way could never perfectly harmonize. Van Eych saw this difficulty, and he became more truly sensible of it, from the circumstance of having exposed one of his paintings to the sun, in order to harden, when the excess of heat split the panel. Being at that period sufficiently skilled both in philosophical and philological inquiries, he began to speculate on the