Mowbray was born of English parents at
Alexandria,
Egypt. His father, John Henry Siddons, represented a British bank in Alexandria; he died of
hyperthermia a year after his son was born. Mowbray's mother moved to America with her son. When Mowbray was five, his mother died, burnt alive in a domestic accident caused by lamp fuel. Left an orphan, the boy was adopted by his aunt, his mother's sister, and her husband, George Mowbray. The family settled at
North Adams, Massachusetts. After a year at the
United States Military Academy at West Point, he went to
Paris and entered the
atelier of
Leon Bonnat in 1879, his first picture,
Aladdin, bringing him to public notice. He studied with Bonnat until 1883. ==Artistic career==