And obliged humble servant, JOHN KNOWLES. 4, Osnaburgh Street, Regent's Park, 24th March, 1830. ADVERTISEMENT. In offering to the public the Life and a complete edition of the literary Works of Henry Fuseli, I feel myself called upon to state the sources whence the former has been drawn. The daily intercourse and sincere friendship which subsisted for many years between this great artist and myself, afforded me the opportunity of witnessing his domestic habits, hearing many of the incidents of his life, and watching his career as an artist; and, being executor to his will, his professional as well as private papers came into my possession. Independently of these advantages, I have been in correspondence with the nearest branches of his family, (at Zurich, in Switzerland,) and from their kindness have obtained many particulars of his early life, together with the correction of some previously inaccurate dates. Whatever estimate, therefore, may be formed of my work, as a literary production, the particulars have been gathered from the most authentic and unquestionable sources. With respect to his works, it may be necessary to state that the first Six Lectures were published in a quarto volume under Mr. Fuseli's own superintendence, and were printed in a more extended form than that in which they were delivered; additional observations having been inserted for the press, and notes added to indicate the authorities whence his opinions were derived. They are now reprinted from a copy in my possession, in which are noted some corrections by the author. The remaining Six Lectures are published from the manuscripts in his own hand-writing, without any addition, omission, or alteration. The Aphorisms were collated, and re-copied fairly some years before the death of the author: these are printed _verbatim_ as he intended they should come before the public. The History of the Italian Schools of Art will be found to contain the professional lives of Michael Angelo, Raffaelle, Titian, Correggio, and other great masters, with the author's criticisms on their works. Most of the observations on Art were made by Fuseli while in Italy and France, after a close inspection of the frescoes, pictures, or works in sculpture, which he describes or criticises; and the particulars of the lives of the artists were deduced from a careful perusal and comparison of the most elaborate and esteemed works in which they have been recorded.