 Fletcher worked in London, and produced engravings possessing some merit.He most excelled as an engraver of flowers, notably "The Twelve Months of Flowers" and "The Twelve Months of Fruits", engraved from drawings by Pieter Casteels, made in 1730 for a publication by Robert Furber, the well-known gardener.He also engraved some fine plates of birds from drawings by Casteels and Charles Collins.