Also in this year, it was decided that no land would be let along the Lisburn Road. Although originally conceived primarily as a school for the education of the children of Methodist ministers, the school has been interdenominational from its inception. During this time the college prepared some students for the examinations (including degree examinations) of the Royal University of Ireland. While day classes had been provided for girls for the early years, there was no provision for the daughters of ministers to board as the boys could. This was remedied by a gift from Sir William McArthur to found a hall of residence for girls. Building work on McArthur Hall was completed in 1891. The hall was designed by Sir Thomas Newenham Deane and his son Thomas Manly Deane. No further major building work would take place until the 20th century but modifications were made to existing buildings including the creation of science labs. Edwardian period In 1901 it was decided that the provision for science in the school was insufficient and a dedicated science block was constructed which included two lecture rooms and now comprises H-Block. During the course of the First World War 428 pupils served in the armed forces and 80 were killed. Further specialised rooms were built in 1919 including more labs, art rooms and classrooms. In an attempt to provide classroom space to a growing student population, the college purchased second-hand American Hospital Huts which were erected across the school in 1921. One of these huts remained in the college, between the Whitla Hall and the Drama Studio, until the early 2010s. The Marquess of Londonderry donated books to the college that were used in the school's Londonderry Library. Around this time with the theological students gone and the Headmaster moved out of his rooms to College Gardens, the Main Building was remodelled to better accommodate boarders. Like other schools at the time, the boarders lived in "houses" but unlike other schools, rather than staying in the same house during their time there, they would move from house to house as they progressed through the school. The houses were Bedell House, Castlereagh House and Kelvin House and the boys would move up through them. They were named after two prominent Irishmen and one Englishman; Anglican clergyman William Bedell, born in Essex but dying in Cavan, statesman Robert Stewart, Viscount Castlereagh and scientist William Thomson,