"Walls." . . . . "Cathedrals." . . "Transepts." . . "Roofs." . . "Guastavino vaults." . . "Washington (D.C.)" . . "Vault bays." . . "Churches." . . "Naves." . . "Bays (building divisions)" . . "Ceilings." . . "Choirs." . . "Baptisteries." . . "Triforiums." . . . . . . "Designs and plans" . . . . . . "Washington Cathedral, Washington, D.C. [detail drawings of tile vaults, transepts, choir, and nave]" . . . . . . . . . . . . "Pencil drawings" . . . . "Detail drawings" . . . . . . "Blueprints" . . . "Orthographic drawings" . . "Architectural drawings" . . "This set consists of 8 drawings, graphite on tracing paper; and 13 drawings, blueprints on paper." . . "Wall tile." . . "Frohman, Robb & Little." . .