Before he turned twenty he went to Paris to study in veterinary school to make himself fully acquainted with the anatomy of horses and other animals.
About eight years ago, he being then in Switzerland, a rich Englishman (George Pitt, later Lord Rivers) asked him to paint his favourite dog (greyhound) which had died.
In that partial article much is said of his extreme devotion to art, of his marvelous knowledge of anatomy, of his special fondness for the English racehorses, and his excellence in depicting them.
He appears first in the Academy catalogues in 1801 as the exhibitor of the 'Portrait of a Horse', and continued to exhibit more or less until 1845 (contradicting Nagler's statement that he died "about" 1806).
The writer of the panegyric already quoted says, however, that he did not work for money, but that he was urged forward by the resistless force of natural genius.