shallow bays with first-floor Oriel windows. The southeast and southwest bays have deep pediments, with the central bay having a triangular pediment. The basement forms a rusticated plinth, the front being battered and chamfered. The entrance is at the east end and is formed by a semi-circular arch with stepped windows above that light the stairwell. There are similar windows on the east elevation. There is a high parapet on the façade with the coat of arms of Professors George Murray Humphry and John Willis Clark. Lettering and a motto on the façade were cut by Eric Gill. The central gable is ornamented with carved lilies designed by Prior. The rear elevation, again of three stories above a basement, had pairs of segmental headed separated by vertical panels of stone. It has now been built over. Interior In layout, the building has axial corridors with research rooms, laboratories and offices on the ground floor and a large windowless lecture theatre. The first floor contained a barrel vaulted double height library and the Humphry Memorial Museum (in memory of the first Professor of Surgery, Sir George Murray Humphry). The museum was on two stories with a hexagonal dome resting on marble columns with distinct entasis. Further columns divided the space into nave and aisles. Funds were raised by the University some 10 to 15 years after the death of Sir George to build the museum to commemorate his role in the development of modern surgery, post-operative care and hygiene. Materials The columns were covered in glazed tiles by Conrad Dressler. The staircase is of Hopton Wood stone with curved angles to the treads to minimise the collection of dirt and ease cleaning. Prior designed the integrated oak banisters, balusters and railings. Throughout the building every detail was designed to minimise potential sources of infection and dirt collection; for example, the doors and fittings have no mouldings. The Downing Street front is of Ancaster stone with rusticated Derbyshire stone dressings. The northern rear elevation is in brick with stone dressings. The floors are of jointless cement, and the roof is supported by a rolled steel joist system. Prior paid great attention to the roof design to minimize potential dirt traps, ensuring that not even a rivet projected as a potential collecting area. Utilities The building incorporated a plenum system of heating and ventilation. The air was washed, cleaned, screened and warmed before