In speaking of London we sometimes mean Smaller London and sometimes Greater London. To avoid confusion we must clearly understand what is meant by each. Smaller London comprises 28 Superintendent Registrars’ Districts, 20 of them being in Middlesex, 5 in Surrey, and 3 in Kent; viz. Kensington, Chelsea, St. George, Hanover Square, Westminster, Marylebone, Hampstead, Pancras, Islington, Hackney, St. Giles, Strand, Holborn, London City, Shoreditch, Bethnal Green, Whitechapel, St. George in the East, Stepney, Mile End and Poplar in Middlesex; St. Saviour, Southwark, St. Olave, Southwark, Lambeth, Wandsworth, and Camberwell in Surrey; and Greenwich, Lewisham, and Woolwich in Kent. It had an estimated population in the middle of 1878 of 3,577,304. Greater London comprises in addition to the above 14 Superintendent Registrars’ Districts, 6 of them being in Middlesex, 4 in Surrey, 2 in Kent, and 2 in Essex; viz. Staines, Uxbridge, Brentford, Hendon, Barnet, and Edmonton in Middlesex; Epsom, Croydon, Kingston, and Richmond in Surrey; Bromley and Bexley in Kent; and West Ham and Romford in Essex. It comprises the whole of Middlesex, and such parishes of Surrey, Kent, Essex, and Herts as are within 12 miles of Charing Cross. These additional districts had an estimated population of 872,711 in the middle of the year 1878, so that Greater London has therefore at the present time a population of 4,450,015. The population of the United Kingdom in the middle of 1878 was estimated at 33,881,966. Greater London had therefore considerably more than an eighth of the population of Great Britain and Ireland, and more than a sixth of the population of England and Wales. This large population is constantly and rapidly increasing; the estimated increase in 1878 being 82,468. It is important to note that the increase is not equal in all parts. The population is decreasing within the City; within Smaller London it goes on increasing but at a decreasing rate, and in the outer ring the population increases steadily at an increasing rate. The population of the outer circle has increased more than 50 per cent. in the last ten years.