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INTRODUCTORY

again be "presentations"; and he must select only such broad tendencies, or such minute historic characters as bear straight upon some aspect of his subject. The historic facts must illustrate, must cast a light upon modern London, if that is what is being presented. There must be no writing about Dr. Johnson's chair in a certain tavern merely because it appeals to the author. The reader will find details of all such things in other books—this author's endeavour should be to make the Past, the sense of all the dead Londons that have gone to the producing of this child of all the ages, like a constant ground-bass beneath the higher notes of the Present. In that way the book mighty after a fashion, forecast even the Future and contain prophecies. It should, in fact, be instinct with the Historic sense which will afford apt illustrations, rather than the annalist's industry, or the love of the picturesque.

That sense of the picturesque will, however, be both a salvation and a most dangerous stumbling-block. In a turning off an opulent High Street, there is a court with the exterior aspect of which I am very familiar. It is close to a large freestone Town Hall and to a very tall red-brick Fire Station. It is entered by a square archway through which you get a glimpse of dazzlingly white cottages that, very obviously, were once thatched, but that now have pretty red tiles. It is

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