at Burlington House, 1940, Cooper showed The Model and the Mirror, featuring a female nude with 1940s hairstyle in classical pose with a mirror. In 1942 an exhibition dedicated to Cooper was held in the Wolsey Suite of Bentalls department store at Kingston upon Thames. In 1953, Cooper showed his watercolour scene, Palace Pier, Brighton, at the RW3 Galleries in Conduit Street, London. For the Royal Society of British Artists summer exhibition of 1953, Cooper contributed a painting titled Summer, showing a blonde female nude standing by a river. In 1955 an ad hoc exhibition at the Six Bells pub, Chelsea, included a work by Cooper. In 1964 he exhibited at the Royal Society of Portrait Painters exhibition at 195 Piccadilly. In 1973, when Cooper was nearly 90 years old, some of his First World War paintings of aircraft and views from them, including his Over the Lines, were exhibited at the Parkin Gallery in Belgravia, London. In 1974, shortly after Cooper died, a memorial display of twelve of his "striking canvases" was exhibited at Chelsea Art Society's 28th show at the Chenil Galleries in Chelsea. Cooper had been president of the Society for "many years", and his wife Irene became president after him. Cooper also exhibited at the Walker Art Gallery, Liverpool, The Royal Institute of Oil Painters (ROI), the Royal Institute of Painters in Water Colours, the Manchester Art Gallery, and the Royal Society of Arts. Collections National Portrait Gallery, London: Sir Barnes Wallis (1942), John Moore-Brabazon, 1st Baron Brabazon of Tara (1958), Winston Churchill Collotype print (1942). Imperial War Museum (WM), London: Airship 9 (1918), Airship 23 (1918), Rigid 26 (1918), R.34 and R.29 in the Shed at East Fortune (1919), Surgeon Major Arthur Martin-Leake (1874–1953), VC, RAMC (1921). At the IWM Duxford there are seven of Cooper's "pictures from the air". Guildhall Art Gallery: Sir Gerald Dodson, Lord Mayor's Banquet in the Guildhall, London, 1963, Sir Rupert de la Bôre (1893–1978), Lord Mayor of London (1952), The Pool of London (1913), Parliamentary Art Collection: The Lying-in-State of Winston Churchill in Westminster Hall, 1965, Royal Air Force Museum: Marshal of the Royal Air Force Lord Portal (1893–1971) (1943), Battle of Britain pilot Group Captain Clair Grece, DFC, MA (Oxon) (1945), Sir Barnes Neville Wallis (1887–1979) (1964), Marshal of the Royal Air Force Lord Portal (1893–1971) (c.1945), R34, East Fortune, Scotland (1919), Right Honourable Lord Brabazon of Tara