During the period of his travels through Italy in pursuit of antiquities, he had carefully collected materials for a general History of Painting, which was meant to comprize, in a compendious form, whatever should be found scattered throughout the numerous authors who had written upon the art. These materials, as well as the work itself, had gradually grown upon his hands, as might be expected from a man so long accustomed to method, to criticism, to perspicuity; in short, to every quality requisite in the philosophical treatment of a great subject. The artists and literati of Italy, then, were not a little surprised at the appearance of the first portion of the _Storia Pittorica_, comprehending _Lower Italy; or the Florentine, Sienese, Roman, and Neapolitan Schools, reduced to a compendious and methodical form_, _adapted to facilitate a knowledge of Professors and of their Styles, for the lovers of the art_. It was dedicated to the grand duchess Louisa Maria of Bourbon, in a style, observes the Cav. Bossi, "which recalls to mind the letters of Pliny to Trajan, composed with mingled dignity and respect; with genuine feeling, and with true, not imaginary, commendations." _Elogio_, p. 127. But the unfeigned pleasure and admiration expressed in the world of literature and art, on being presented with the Pictorial History of Lower Italy, was almost equalled by its disappointment at the delay experienced with regard to the appearance of the second part; and which it was feared would never see the light. Lanzi's state of health had, some time subsequent to 1790, been very precarious; and he suffered severely from a distressing complaint,[25] which frequently interrupted his travels in which he was then engaged, collecting further materials for his History of Painting in Upper Italy. While thus employed, on his return from Genoa in December, 1793, he experienced a first attack of apoplexy, as he was passing the mountains of Massa and Carrara. After his recovery, and return to Florence, he was advised in the ensuing spring to visit the baths of Albano, which being situated near Bassano, afforded him an opportunity of superintending the publication of his history, in the Remondini Press, and on a more extensive scale than he had at first contemplated. He likewise obtained permission from the grand duke Leopold to absent himself, during some time, from his charge at Florence, in September, 1793. The first portion of his labours he conceived to be too scanty in point of names and notices to satisfy public taste, so that upon completing the latter part upon a more full and extensive scale, he gave a new edition of that already published, very considerably altered and augmented.