There are four houses in which Appleby's boarding students reside, and with which the day students are affiliated: Baillie House; Walker House; Colley House; and Powell's House. Baillie House is a girls' residence and named after a prominent family that has attended and supported Appleby for several generations. Walker House was one of three boys' residences before co-education and is now a girls' residence, and is named for the school's original benefactor, Sir Byron Edmund Walker. Colley and Powell's are boys' residences and are named for former Appleby Masters. T.B. Colley taught at Appleby for 35 years and was housemaster of School House, which was renamed in his honour in 1949. Vernon Powell received the Military Cross and died during World War I.