This book, the germ of which consists of ten letters published in tho Morning Post during the month of January, 1861, under the title of "London Horrors," is an attempt to beat the bounds of metropolitan dirt and misery. As a special correspondent of a newspaper is not a parliamentary committee, and I hardly felt inclined to produce a blue-book, this volume contains indications rather than proofs of metropolitan social degradation. The proofs, however, unfortunately are not far off; and for a million of people to live in London as they are now living, and, in the main, are contented to live, is a glaring national disgrace.