Rosa da Tivoli unfortunately fell into extravagant and dissipated
habits, which frequently caused him great inconvenience. From his
facility, he multiplied his pictures to such an extent as greatly to
depreciate their value. It is related that he would sit down, when
pressed for money, dispatch a large picture in a few hours, and send it
directly to be sold at any price. His servant, possessing more
discretion than his master, usually paid him the highest price offered
by the dealers, and kept the pictures himself, till he could dispose of
them to more advantage.