He was, however, mainly interested in painting and drama, and when George Frederick Cooke visited the city he executed a portrait of the actor from recollection of him on the stage, which was considered a work of such promise that a fund was raised to enable the young artist to study in Europe.

[2] He left for London in 1811, bearing introductions which procured for him the friendship of West, Beechey, Allston, Coleridge and Washington Irving, being admitted as a student of the Royal Academy, where he carried off two silver medals.

At first, influenced by West and Fuseli, he essayed high art, and his earliest important subject depicted Saul and the Witch of Endor; but he soon discovered his true aptitude and became a painter of cabinet-pictures, dealing, not like those of David Wilkie, with the contemporary life that surrounded him, but with scenes from the great masters of fiction, from Shakespeare and Cervantes, Addison and Molière, Swift, Sterne, Fielding and Smollett.

Leslie possessed a sympathetic imagination, which enabled him to enter freely into the spirit of the author whom he illustrated, a delicate perception for female beauty, an unfailing eye for character and its outward manifestation in face and figure, and a genial and sunny sense of humour, guided by an instinctive refinement which prevented it from overstepping the bounds of good taste.

[4] Leslie earned a reputation for illustrating well-known works of literature: Ivanhoe, As You Like It, Tristram Shandy, Merry Wives of Windsor, Don Quixote, and several by Irving, among others.

[4] Leslie's letters paint the man as affectionate, social, candid, modest and eager for instruction and improvement, always seeking the society of the best and most eminent of persons to whom he could gain access without intrusion or forwardness.