He was the eldest son of a Dublin silk mercer, and came from a
Roman Catholic family which in the 17th century had been granted extensive estates, possibly in
County Offaly or
County Laois, and their own coat of arms, but had suffered for their religion and since been dispossessed. In his youth he learned to paint landscapes under
Gaspare Gabrielli, and miniature portraits at the
Royal Dublin Society's drawing school under
John Comerford. He won a gold medal in 1805. He was commissioned to paint equestrian portraits of the
Marquess of Sligo and Lord Talbot, the Irish viceroy, and in 1822 he produced six prints entitled
The Life of a Racehorse. That year he moved to London with his wife, Marianna Conan. His painting
Turning out the Stag brought him recognition when it was exhibited at the
Royal Academy in 1825. Marianna died in 1832, giving birth to their seventh child. Doyle continued to exhibit miniatures until 1835, but by then he was experiencing greater success with his political cartoons, printed using the new reproductive medium of lithography, beginning in 1827. These were issued once a month during parliamentary sessions, and continued for twenty-two years. His caricatures were mostly faithful likenesses of their subjects, with little exaggeration, treated with sarcastic humour, often alluding to popular plays. They were signed with the letters H. B., constructed out of two Js and two Ds, Doyle's own initials. By 1840 he was prosperous enough to afford a fashionable house in
Hyde Park, moving in the same circles as
David Wilkie,
Walter Scott,
Samuel Taylor Coleridge,
Charles Dickens,
William Makepeace Thackeray,
Thomas Macaulay,
Thomas Moore and
Samuel Rogers – but H. B.'s true identity remained a closely guarded secret until he revealed it in 1843 in a seventeen-page letter to
Sir Robert Peel. == Career ==