He was a veritable inventive genius. Until his time difficulties in drawing had been overcome mostly by ignoring them. Since no artist had been able to draw a foreshortened foot, it had been the fashion in art to paint people standing upon their tiptoes, to make it possible for an artist to paint the foot. The enterprising Thomas came along and he decided that feet must be painted both flat and crossed, on tiptoe or otherwise; in short he did not mean to lose by a foot. He worked at this problem day and night, till at last the naturally poised foot came into existence for the artist. Never after Masaccio's time did an artist paint the foot stretched upon the toes. Moreover, until his time flesh had never been painted of a remotely natural colour, so Masaccio set about combining colours till he made one that had the tint of real flesh. Thus he was the first to overcome the difficulties of drawing and the first to discover a mixture that would not leave a glazed, hard, unnatural appearance and be likely to crack and destroy the finest effort of an artist. He worked during his youth in Pisa, where the "leaning tower" stands; then he worked in Florence, finally in Rome, but those early pictures are long since gone. It was a century of adventure and discovery as well as of art, and with so much change, so many wars and rumours of wars, many great art works were lost. Besides, the horrible plague swept Italy east, west, north, and south. Who was to concern himself with saving works of art, when human life was going out wholesale all over the land? Masaccio was certainly very poor most of his life. He lived with his mother and his brother Giovanni, an artist like himself, but not nearly so brilliant. Masaccio could not spend his life in painting but had to eke out the family fortunes by keeping a little shop near the old Badia, and being pestered day and night by his creditors he was forced again and again to go to the pawn shop. Somewhere about 1422, careless Thomas painted his greatest picture which was doomed to destruction too early for us to know much about it; but it was named "San Paolo" and it was painted in the bell-room of the Church of the Carmine in Florence. The figure for his model was an illustrious personage, Bartoli d'Angiolini, who had held many honourable offices in Florence for many years. A critic and friend of artists tells us that the portrait was so great it lacked only the power of speech. In this picture Masaccio made his first great triumph in the foreshortening of feet.