Club House. The main evidence of war-time occupancy of Gladesville Hospital – is the air raid shelter (near the vegetable gardens, later used as a garden storage shed) and an ablution block, built more recently and the only intrusive structure on site. The air raid shelter was for patients and staff at the hospital and was cut into the terrace alongside the Weaver wing's main front. 1950s changes included: alterations to The Priory building; demolition of the Mission House in 1952, conversion of the cow shed into a store and cleaning room, following fires in 1954 and 1958; and removal of Salter's stone garden store in 1955. 1967 NSW Public Works Department changes: 1966 and 1967 plans show modifications made during the 1967 NSW Public Works Department maintenance program. Toilets to the rear of the pavilion of the Weaver wing were removed to convert the space to a boiler room and a tank and stand erected to the south. These have since been removed. A brick extension, with a clip-lock roof, was added to the south of the boiler room to provide a new shower and toilet facilities. This necessitated excavation and building the retaining wall to the west. Two of the windows in the rear wall of the Weaver pavilion were filled in and the third converted to a doorway to the new extension. Fire escape doors were inserted into window openings in the west wall of the Weaver wing and the south wall of the Salter wing, and metal stairs attached. These were later removed and the windows reconstructed. A commercial kitchen was installed, , at the western end of the Salter wing. This required removal of walls, fireplaces, floors and joinery. The fitout of the kitchen was removed in a later upgrade of the house, and the servery between kitchen and dining room filled in and the surface re-finished. A building maintenance program in 1967 saw a number of modifications made: various alterations to front and rear verandahs, removal or blocking (up) of chimneys and repair and replacement of joinery. Internal finishes such as wall and ceiling plaster were changed. A timber-framed tank stand was built on the southern elevation (later removed) and there were excavations and rebuilding of retaining walls. The grounds were also altered in this period: earlier, in 1889, mud flats at Tarban Creek were filled to provide more agricultural land. This area was