Born in Camberwell, London on 9 April 1832, he was son of Henry Collingwood Aumonier, a jeweller, by his wife, Nancy Frances, daughter of George Stacy; a younger brother worked as an engraver, and a nephew Stacy Aumonier became a landscape painter and decorative designer.
[1] Aumonier exhibited for the first time at the Royal Academy in 1871, but continued his work on calico until after 1873, when Sir Newton Mappin purchased a picture shown by him at the Royal Academy, An English Cottage; Home.
He concentrated himself on peaceful English countrysides, specially with autumn tints or during late afternoon.
His pictures included When the Tide is Out, The Silver Lining of the Cloud (both in the Royal Academy of 1895), In the Fen Country, The Old Sussex Farmstead, and Sunday Evening.
Sheep Washing was in the Chantrey bequest collection at the Tate Gallery, which also owned his painting Black Mountains.