,
11, and
12 Downing Street, for the 1958 renovation of the buildings In 1946 Erith opened an office in
Ipswich, moving it to Dedham in 1958. His architecture ranges from
cottages and small houses to public buildings such as the Library and quadrangle at
Lady Margaret Hall,
Oxford (1959–1963),
Jack Straw's Castle on
Hampstead Heath (1963) and the New Common Room Building at
Gray's Inn (1971). Major work includes 15,17 and 19, Aubrey Walk, London W8 (1951), The Pediment,
Aynho, Northamptonshire, and its garden buildings (1956–73), the Provost's Lodgings at the
Queen's College, Oxford (1958), and the Folly in
Herefordshire (1961). His larger country houses are
Bentley, Sussex (1960–71), Wivenhoe New Park, Essex (1962), and King's Walden Bury, Hertfordshire (1969). The best known of his many restorations was the reconstruction of Nos 10 and 11 and complete rebuilding of No. 12, Downing Street (1959–63). He also remodelled numerous houses including Morley Hall,
Wareside, Hertfordshire (1955), Wellingham House,
Ringmer, Sussex (1955–71), Hunton Manor,
Hampshire (1962), and Shelley's Folly,
Cooksbridge, Sussex (1968). After Erith's death in 1973, his partner
Quinlan Terry carried on his practice (now Quinlan Terry Architects). == Draughtsmanship ==