 On 21 November 1802 , his wife Mary bore Grimaldi his only child , a son , Joseph Samuel , whom they called " JS " . Grimaldi introduced his young son to the eccentric atmosphere at both Drury Lane and Sadler 's Wells from the age of 18 months . Although eager to have his son follow him onto the stage , Grimaldi felt that it was more important for the boy to have an education and eventually enrolled him at Mr Ford 's Academy . 
