Pembroke College Oxford, details of alterations to the east range, circa 1846 Digital

This appears to be the new passage way driven through the existing building at the east end of the old quadrangle, to give access to the newly created quadrangle and the lecture room in the same building. Various details subtitled: Archway to New approach, 2 feet to an inch; Details to Archway, 1/8th size; Elevation & Sections of Dormer for Lecture Room, scale 2 feet to an inch; Detail of Windows in West front of building, 1/8th size; Details of Dormer, 1/8th size.