By 1901 space in the Main Building was insufficient and a further wing was planned for the Main Building to designs of local architects, Hall and Dods, a partnership of Francis Richard Hall and Robert Smith Dods and the extension was constructed by John Watson.
Following the Industrial and Reformatory Schools Act of 1865, which regulated the detention of neglected and criminal children, the Sisters established an industrial school in 1868 in rented cottages adjacent to All Hallows'.