5th Gloucesters, a territorial battalion of the regiment. He succeeded his father as architect to Gloucester Cathedral, and had five children from two marriages. He married, first, Helen Durrant, with Anthony, Audrey, Oriana and Letitia as children. Then he married Marion Taylor, with daughters Marion and Priscilla. Oriana married E. S. P. Haynes, an Eton and Balliol scholar who became a dedicated divorce law reformer. They had three daughters, Renée, Celia and Elvira. Renée Haynes, a successful novelist, married Jerrard Tickell, an Irish writer. They had three sons, one of whom, Crispin, became a distinguished civil servant. The daughter of another son, Patrick, is Dame Clare Tickell, Chief Executive of Action for Children. Clare Tickell's brother, Adam, was Pro Vice Chancellor at the University of Birmingham, which grew out of Mason Science College which Thomas Huxley formally opened in 1880. Professor Adam Tickell is now Vice Chancellor at the University of Sussex. Sir Crispin Tickell Sir Crispin Tickell GCMG KCVO (25 August 1930 - 25 January 2022) is a British diplomat, academic and environmentalist. He is the great-grandson of Jessica Huxley. He was Chef de Cabinet to the President of the European Commission (1977–1980), British Ambassador to Mexico (1981–1983), Permanent Secretary of the [Overseas Development Administration] (now Department for International Development) (1984–1987), and British Ambassador to the United Nations and Permanent Representative on the UN Security Council (1987–1990). Tickell was Warden of Green College, Oxford, between 1990 and 1997 and is director of the Policy Foresight Programme of the James Martin Institute for Science and Civilization at the University of Oxford. He has been the recipient, between 1990 and 2006, of 23 honorary doctorates. He is the president of the UK charity Tree Aid, which enables communities in Africa's drylands to fight poverty and become self-reliant, while improving the environment. He has many interests, including climate change, population issues, conservation of biodiversity and the early history of the Earth. His son, Oliver Tickell, is a journalist, author and campaigner on environmental issues. Rachel Huxley (1862–1934) and issue Rachel Huxley, the fifth of T. H. Huxley's children, married civil engineer Alfred Eckersley in 1884, who built railways in various parts of the world. Their eldest son, Roger Huxley Eckersley, was born in Algeria; their second, Thomas Lydwell Eckersley, was born the next year. The family moved to Mexico, and their third son, Peter Eckersley, was born there. All three children married