Map of the Principal Factories & Works in the Metropolitan Area, printed by the Ordnance Survey Southampton for the Royal Commission on London Traffic 1904. Three maps on paper, each 90 by 50 cm. Scale 3 inches to the mile. Sheet 1 covers the west of London from Hendon in the north down to the Thames at Ham and across to Wimbledon Park lake in the south. Sheet 2, the central sheet, covers an area from Hampstead across to Walthamstow in the north down to Garratt Mills on the River Wandle in Wandsworth and across to Lewisham in the south. Sheet 3 covers the east of London from Leyton across to Ilford in the north and from Lewisham across to New Eltham in the south and covers the Thames east to Barking Creek with its Guano works. The map is packed with information on manufacturing employment and crafts in early 20th century London; a key provides information on the location of 20 different trades and industries and 4 categories of factories by size, from those employing 100 workers to over 1,000. Figures in red indicate the population in each borough, the number of persons engaged in principal trades who reside there and the number of people employed in each district based on the census of 1901. Hundreds of workplaces are shown on the map, from small-scale enterprises to major factories. These include bus depots; lamp works; gas works; corn mills; bakeries; potteries; dressmaking; coach making; coffee processing; jam factories; confectionery makers; goldsmiths; gun makers; piano works; vinegar works; varnish and ink works; boat builders and breweries. The areas around the Thames and central London have dozens of workplaces that reveal the concentration and range of occupations in London. A fascinating snapshot of London life and work. Maps have been folded. VG to Mint condition.