62 (B) Robert Stephenson and Francis Thompson: Derby, Trijunct Railway Station, 1839-41 (from Russell, _Nature on Stone_) 63 J. B. Bunning: London, Coal Exchange, 1846-9 (from _Builder_, 29 Sept. 1849) 64 Sir Joseph Paxton and Fox & Henderson: London, Crystal Palace, 1850-1 (from _Builder_, 4 Jan. 1851) 65 I. K. Brunel and Sir M. D. Wyatt: London, Paddington Station, 1852-4 (from _Illustrated London News_, 8 July 1854) 66 (A) Lewis Cubitt: London, King’s Cross Station, 1851-2 (British Railways) 66 (B) Karl Etzel: Vienna, Dianabad, 1841-3 (from _Allgemeine Bauzeitung_, 1843) 67 (A) Decimus Burton and Richard Turner: Kew, Palm Stove, 1845-7 (N.B.R.) 67 (B) James Bogardus; New York, Laing Stores, 1849 (B. Abbott) 68 L.-T.-J. Visconti and H.-M. Lefuel: Paris, New Louvre, 1852-7 (Giraudon) 69 H.-P.-F. Labrouste: Paris, Bibliothèque Nationale, Reading Room, 1862-8 (Chevojon) 70 (A) H.-J. Espérandieu: Marseilles, Palais Longchamps, 1862-9 (R. Viollet) 70 (B) J.-L.-C. Garnier: Paris, Opéra, 1861-74 (Édition Alfa) 70 (C) Charles Rohault de Fleury and Henri Blondel: Paris, Place de l’Opéra, 1858-64 (Chevojon) 71 J.-L.-C. Garnier: Paris, Opéra, Foyer, 1861-74 (Bulloz) 72 (A) J.-A.-E. Vaudremer: Paris, Saint-Pierre-de-Montrouge, 1864-70 (R. Viollet) 72 (B) J.-F. Duban: Paris, École des Beaux-Arts, 1860-2 (Giraudon) 73 (A) Gottfried Semper and Karl von Hasenauer: Vienna, Burgtheater, 1874-88 (Österreichische Nationalbibliothek) 73 (B) Theophil von Hansen: Vienna, Heinrichshof, 1861-3 (from a water-colour by Rudolf von Alt) 74 Vienna, Ringstrasse, begun 1858 (from a water-colour by Rudolf von Alt) 75 (A) A.-F. Mortier: Paris, block of flats, 11 Rue de Milan, _c._ 1860 (J. R. Johnson) 75 (B) Giuseppe Mengoni: Milan, Galleria Vittorio Emmanuele, 1865-77 (Alinari) 76 (A) Gaetano Koch: Rome, Esedra, 1885 (Fotorapida Terni) 76 (B) J.-A.-F.-A. Pellechet: Barnard Castle, Co. Durham, Bowes Museum, 1869-75 (Copyright Country Life) 77 (A) Friedrich Hitzig: Berlin, Exchange, 1859-63 (F. Stoedtner) 77 (B) Julius Raschdorf: Cologne, Opera House, 1870-2 (Courtesy of Rheinisches Museum, Cologne) 78 (A) Cuthbert Brodrick: Leeds, Town Hall, 1855-9 (N.B.R.)