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Sir Rowland Hill, British teacher, pamphleteer and creator of penny postage, 19th century. Artist: Unknown
 
General Post Office, London, 19th century.Artist: J Woods
 
Guglielmo Marchese Marconi, Italian electrical engineer, (c1924). Artist: Unknown
 
Samuel Finley Breese Morse, American inventor, (1934). Artist: Unknown
 
Grand Junction Canal, Braunston, Northamptonshire, 1819. Artist: John Hassell
 
Grand Junction Canal from Stow Hill near Upper Heyford, Northamptonshire, 1819. Artist: John Hassell
 
Entrance to Blisworth Tunnel, Grand Junction Canal, Northamptonshire, 1819. Artist: John Hassell
 
Mail coach on the Bath to London run, c1840. Artist: Unknown
 
Inn yard with Mail Coach preparing to leave, c1840. Artist: Unknown
 
Telephone switchboard, 1956. Artist: Unknown
 
Cray-2 supercomputer. Artist: Unknown
 
Printed circuit board. Artist: Unknown
 
John Logie Baird (1888-1946), Scottish electrical engineer and pioneer of television. Artist: Unknown
 
John Logie Baird (1888-1946), Scottish electrical engineer and pioneer of television, 1920s Artist: Unknown
 
John Logie Baird (1888-1946), Scottish electrical engineer and pioneer of television, 1920s. Artist: Unknown
 
John Logie Baird (1888-1946), Scottish electrical engineer and pioneer of television, 1920s. Artist: Unknown
 
John Logie Baird (1888-1946), Scottish electrical engineer and pioneer of television, 1920s. Artist: Unknown
 
John Logie Baird (1888-1946), Scottish electrical engineer and pioneer of television. Artist: Unknown
 
John Logie Baird (1888-1946), Scottish electrical engineer and pioneer of television, 1920s. Artist: Unknown
 
Pony Express rider crossing hostile country pursued by native Americans, 1861. Artist: Unknown
 
Wireless officer sending a message by Morse Code from on board a ship, 1916. Artist: Unknown
 
Alexander Graham Bell (1847-1922), Scottish-born American inventor. Artist: Unknown
 
Alexander Graham Bell (1847-1922), Scottish-born American inventor, 1907. Artist: Unknown
 
Alexander Graham Bell (1847-1922), Scottish-born American inventor. Artist: Unknown
 
Alexander Graham Bell (1847-1922), Scottish-born American inventor, 1883. Artist: Unknown
 
Alexander Graham Bell (1847-1922), Scottish-born American inventor, 1877 (1890). Artist: Unknown
 
Alexander Graham Bell (1847-1922), Scottish-born American inventor, 1877 (1883). Artist: Unknown
 
Alexander Graham Bell (1847-1922), Scottish-born American inventor, 1876. Artist: Unknown
 
Grand Junction Canal, Northampstonshire, 1819. Artist: Unknown
 
George Stephenson's locomotive 'Rocket', c1875. Artist: Unknown
 
Seated scribe, Ancient Egyptian, 5th Dynasty, 2498-2345 BC. Artist: Unknown
 
Model of a seated scribe, Ancient Egyptian, 18th Dynasty, 1550-1293 BC. Artist: Unknown
 
Model of a seated scribe, Ancient Egyptian, 5th Dynasty, 2498-2345 BC. Artist: Unknown
 
Model of a seated scribe, Ancient Egyptian, 5th Dynasty, 2498-2345 BC. Artist: Unknown
 
Telegraph construction camp during the American Civil War, 1861-1865. Artist: Unknown
 
One of General Grant's Union Field Telegraph stations during the American Civil War, 1861-1865. Artist: Unknown
 
Digging the Panama Canal, 1888. Artist: Unknown
 
Paying West Indian labourers, 1888. Artist: Unknown
 
Scene from the de Lesseps attempt to dig the Panama Canal, 1888. Artist: Unknown
 
Excavating the Panama Canal, 1888. Artist: Unknown
 
Central Pacific Railraod in the Sierra Nevada mountains, c1875. Artist: Unknown
 
Riot by railway workers at Martinsbury on the Baltimore and Ohio Railroad, August, 1877. Artist: Unknown
 
Early American railroad car adopted from road transport. Artist: Unknown
 
Race between Peter Cooper's locomotive 'Tom Thumb' and a horse-drawn railway carriage, 1829. Artist: Unknown
 
Locomotive emerging from the Kingwood Tunnel through the Alleghany Mountains, 1861. Artist: Unknown
 
Baltimore and Ohio Railroad, North America. Artist: Unknown
 
Mule wagon passing through the Cumberland Gap, Kentucky. Artist: Unknown
 
United States Army Signal Corps in France operating a field radio station, July 1918. Artist: Unknown
 
United States Army Signal Corps using captured German telephone equipment, World War 1. Artist: Unknown
 
Cross-section of Edison's lamp-black (carbon) button telephone transmitter (microphone), c1891. Artist: Unknown
 
Edison transmitter and a 'pony crown' receiver, New York, c1891. Artist: Unknown
 
New York telephone subscriber making call through operator at telephone exchange, 1883. Artist: Unknown
 
Edison telephone in a wall-mounted box, New York, 1890. Artist: Unknown
 
Wall-mounted Edison carbon telephone with 'pony-crown' receiver, New York, 1879. Artist: Unknown
 
Sending and receiving apparatus with battery box at base, Edison carbon telephone, 1890. Artist: Unknown
 
Edison carbon telephone, 1879. Artist: Unknown
 
Maria Rodriguez, Spanish actress, 1905. Artist: Unknown
 
'Bell's telephone in operation', late 19th century.Artist: Gilbert
 
United States Post Office, Houston, Texas, USA, 1937. Artist: Unknown
 
US Post Office, Minneapolis, Minnesota, USA, 1955. Artist: Unknown