Cooper, Edward Joshua (1798–1863), born Dublin, and educated in Armagh, Eton College, Windsor, and Christ College, Oxford. After inheriting family estates at Markree, Collooney, co. Sligo, he set about pursuing his interests in astronomy by establishing an observatory (ODNB) – see below
Cooper’s Observatory (1831-1902), Markree Castle, Markree, established by E. J.Cooper at his home. The primary instrument being a 13-inch refracting telescope with a lens by Cauchoix, Paris and mount by Thomas Grubb (1834). Assisted by his observer, Andrew Graham, Cooper made observations of minor planets and a catalogue of ecliptic stars. In 1927 the telescope was sold to a Jesuit seminary in Hong Kong. Damaged during the Second World War, the telescope lens is preserved at Manila observatory (MNRAS, 11, 1850–51, 104; Howse 1986).