He was educated at Mr. Sisson Darling's academy, and later was, with his father, attached to the suite of Sir James Nugent of Donore, Westmeath.
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His style was similar to that of Francesco Bartolozzi, and Gardiner claimed some of the plates bearing Bartolozzi's name as his own work; he subsequently worked for Bartolozzi.
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He worked on their Shakespeare Illustrated, The Economy of Human Life, The Biographical Mirror, The Memoirs of Count de Grammont, Lady Diana Beauclerk's illustrations of John Dryden's Fables and other works.
William Shakespeare | William Laud | Nelson Mandela | Willie Nelson | William Blake | William | William III of England | William Morris | William McKinley | William Howard Taft | William Ewart Gladstone | Nelson | William the Conqueror | William S. Burroughs | William Shatner | William Faulkner | William Randolph Hearst | William Wordsworth | William Tecumseh Sherman | William Hogarth | Prince William, Duke of Cambridge | William Penn | William Jennings Bryan | William Gibson | Horatio Nelson, 1st Viscount Nelson | William Wilberforce | William James | William Makepeace Thackeray | Fort William | William Hanna |
The Hardings published many prints of subjects designed by Silvester and engraved by Francesco Bartolozzi, Jean Marie Delattre, William Nelson Gardiner, and others.