The characteristics of Wren's genius were his versatility, imagination, and originality. We will notice some of the results of these qualities of mind. The tower hardly ever enters into the architectural treatment of the interior. It is used as an entrance lobby or vestry. His simplest plan was a plain oblong, without columns or recesses, such as St. Mildred's, Bread Street, or St. Nicholas', Cole Abbey. St. Margaret, Lothbury, St. Vedast, St. Clement, Eastcheap, have this simple form, with the addition of an aisle or a recess. His next plan consists of the central nave and two aisles, with or without clerestory windows; of this St. Andrew Wardrobe and St. Magnus the Martyr furnish good examples. The third plan is the domed church, such as St. Swithun and St. Mary Abchurch. The merits and architectural beauties of Wren's churches have been recently described in an able lecture delivered by Mr. Arthur Keen before the Architectural Association, a lecture which we should like to see expanded to the size of a book, and enriched with copious drawings. It would be of immense service in directing the minds of the citizens of London to the architectural treasures of which they are the heirs. The churches are remarkable for their beautifully carved woodwork, often executed or designed by Grinling Gibbons or his pupils. Pews, pulpits, with elaborate sounding boards, organ cases, altar pieces, were all elaborately carved, and a gallery usually was placed at the west end. Paintings by Sir James Thornhill and other artists adorn his churches, and the art of Strong the master mason, Jennings the carpenter, and Tijou the metal worker, all combined to beautify his structures.