of the library the Boulevard Morland marks the channel which separated the Isle de Louviers from the N. bank of the river. We return to the Boulevard Henry IV. and cross to the Quai des Celestins, where on our L. stands part of a tower of the Bastille, discovered in 1899 during the construction of the Metropolitan Railway and transferred here. At the corner of the Rue du Petit Musc opposite, is the fine Hotel Fieubert, erected by Hardouin Mansard (1671) on part of the site of the Royal Hotel St. Paul. The principal facade, 2 _bis_ Quai des Celestins, has unhappily been irretrievably spoilt by subsequent additions. Continuing westward, we note No. 32, the site of the Tour Barbeau of the Philip Augustus wall. An inscription bids us remember that there stood the old Tennis Court of the Croix Noire, where Moliere's troupe of the Illustre Theatre performed in 1645. Turning R. up the Rue Falconnier, we come upon (L.) the grand old fifteenth-century palace of the archbishops of Sens (p. 114), now a glass merchant's warehouse. We regain the Place de l'Hotel de Ville by the Quai of the same name, or cross the Pont Marie, and stroll about the quiet streets of the Isle St. Louis (p. 214), and return by the Pont Louis Philippe at its western extremity. [Illustration: HOTEL OF THE PROVOST OF PARIS.] [Footnote 226: All demolished (1911).] [Footnote 227: Under process of demolition (1911).] SECTION VII _The Ville (N. of the Rue St. Antoine)--Tour St. Jacques--Rue St. Martin--St. Merri--Rue de Venise--Les Billettes--Hotels du Soubise,[228] de Hollande, de Rohan[229]--Musee Carnavalet[230]--Place Royale--Musee Victor Hugo[230]--Hotel de Sully._ [Footnote 228: Open Sundays, 12-3.] [Footnote 229: Open Thursdays at 2 o'clock by a permit from the Director.] [Footnote 230: Open daily (except Monday) 10-4 or 5 (1 fr.). Thursdays and Sundays free. Closed till 12.30 Tuesdays.] Two parallel historic roads named of St. Martin and of St. Denis cut northwards through the mass of houses that now crowd the Marais: the latter, the Grande Chaussee de Monseigneur St. Denis, to the shrine of the martyred saint of Lutetia, the former, the great Roman Street which led to the provinces of the north. [Illustration: WEST DOOR OF ST. MERRI.]