Gothic architecture in France, England, and Italy (1915)
Jackson, Thomas Graham, Sir, 1835-1924 · Cambridge [Eng.] University Press · leaf 328
28 the walls including the clerestory were ready fora wooden roof or testudo, and that in the interval between1128 and 1133 the monks put on this wooden roof; thatabout the middle of the 12th century the stone vault wasconstructed, the capitals of the vaulting shafts beingrefixed lower down to… … DURHAM CATHEDRAL—The Nave Plate LIX
Architecture, Gothic
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