Notable alumni include former Prime Minister of Australia Tony Abbott; former Deputy Prime Minister of Australia Barnaby Joyce; the current Chief Justice of New South Wales, Tom Bathurst; the current Archbishop of Sydney, Anthony Fisher OP; former Premier of New South Wales Nick Greiner; seventeen former Wallabies,[8] nine Olympians and eight Rhodes Scholars; as well as the first Australian-born astronaut, Paul Scully-Power, and numerous writers including poet Christopher Brennan, art critic Robert Hughes, and playwright Nick Enright.Following Archbishop Roger William Bede Vaughan OSB's invitation to the Jesuits to come to Sydney, on condition that they open a boys' boarding school, and the bequest of Fr John Joseph Therry, who on his death in 1864 left the greater part of his property to the Society of Jesus, Joseph Dalton SJ concluded arrangements for the purchase of the Riverview property on 28 June 1878.[citation needed] By December 1882, with an enrolment of only 70 boys, the college extended the curriculum to include English composition, writing, music, singing, drawing, painting, Irish history and oral Latin.[citation needed] The Riverview College Observatory was built in 1909, and was established by the distinguished Jesuit astronomer and seismologist, Edward Francis Pigot (1858–1929), who ordered a complete set of seismographs from Göttingen.His studies of seismic aspects of nuclear explosions garnered worldwide attention and he served as vice-president of the Royal Society of New South Wales.[citation needed] In the lead up to the 2003 Iraq War, the three school captains wrote a letter to the Prime Minister of Australia, John Howard, calling for a withdrawal of Australian troops from the Persian Gulf and for a non-military solution.They told Howard a poll of 574 students at the college showed 75 per cent were against Australian military participation in Iraq, regardless of the United Nations’ position.The students had previously met the Anglican Archbishop of Canterbury, Rowan Williams, meditated in Assisi and worked the streets and orphanages of Calcutta with Mother Teresa's Missionaries of Charity.[16] The school motto, Quantum Potes Tantum Aude ("Dare as much as you can, for God and for Man"), was introduced by the rector-headmaster, Thomas Gartlan SJ, in 1906.[20][better source needed] A former Society of Jesus Superior General, Peter Hans Kolvenbach, wrote in The Characteristics of Jesuit Education that the "ideal is the well-rounded person who is intellectually competent, open to growth, religious, loving and committed to doing justice in generosity to the people of God".