Tag Archives: General Eisenhower

American Independence Day

Today Americans all over the world are celebrating Independence Day, commemorating the adoption of the Declaration of Independence on 4th July 1776 and subsequent independence from Great Britain.

As many readers may already know the BPMA and Royal Mail Archive hold material relating to postal communications from a variety of countries, not just Great Britain, so this seemed an appropriate time to highlight two items in the BPMA’s collection with American connections.

A black and white steel engraving of Benjamin Franklin, c. 1865 (2009-0038)

A black and white steel engraving of Benjamin Franklin, c. 1865 (2009-0038)

This steel engraving of Benjamin Franklin, scientist, politician, Postmaster and ‘Founding Father’ of the United States features an inset image of the signing of the Declaration of Independence. The scene shows Thomas Jefferson and John Adams, both of whom went on to serve as President of the United States. Benjamin Franklin has also been featured on a Great Britain stamp, issued in 1976 to mark the bicentenary of the Declaration of Independence.

Letter from General Eisenhower to Captain Crookshank, congratulating engineering and postal staff on their contribution to the war effort (POST 118/1596)

Letter from General Eisenhower to Captain Crookshank, congratulating engineering and postal staff on their contribution to the war effort (POST 118/1596)

One of my colleagues showed me this signed letter from General Dwight D Eisenhower shortly after I started as a Cataloguer at BPMA. As an enthusiastic new recruit and having recently listened to our podcast on the Post Office during the Second World War, I was struck by the seemingly sincere appreciation of the Post Office’s hard work and dedication during the conflict.

Dated 22nd June 1944, whilst Eisenhower was Supreme Commander of the Allied Expeditionary Force, and addressed to the Postmaster General Captain H.F.C. Crookshank, the letter reads:

The build up of the necessary forces for the current operations has involved the construction of a vast network of communications radiating from key centers of vital importance in the United Kingdom. The greater part of this work has been undertaken by the Engineers and Staff of the General Post Office. It is my great pleasure, on behalf of the Allied Expeditionary Force, to ask you to pass on to them my sincere appreciation for their contribution and for the long hours they have worked and for the excellent cooperation they have given toward our success.

Sarah Jenkins – Assistant Cataloguer

Both of these items are available to view on our online catalogue.

A selection of lantern slides showing United States Post Office buildings can also bee seen on our Flickr site.

The birth centenary of Alan Turing

Tomorrow is the birth centenary of Alan Turing the mathematician, logician, cryptanalyst and computer scientist who was highly influential in the development of computers and artificial intelligence.

A stamp from the Britons of Distinction issue, 23 February 2012. 1st Class – Alan Turing.

A stamp from the Britons of Distinction issue, 23 February 2012. 1st Class – Alan Turing.

Turing is perhaps most famous for his work during World War 2 at the code breaking centre in Bletchley Park. There he and others broke a number of German codes, including that of the Enigma machine.

At Bletchley Park Turing worked with a number of engineers seconded from the General Post Office’s engineering department, including Gordon Radley and Tommy Flowers. Radley and Flowers were both involved in the development of Colossus, the world’s first programmable electronic computer, which broke the Nazi’s Lorenz codes and convinced General Eisenhower to go ahead with D-Day. While Alan Turing was not directly involved in the development of Colossus his work fed in to the thinking behind it.

After the war Gordon Radley returned to the Post Office where he was involved in the development of the first transatlantic submarine cable, the invention the hearing aid, and projects to mechanise post sorting which led to the development of the postcode. He eventually rose to become Director General (Secretary to the Post Office), the first engineer to do so.

Tommy Flowers also returned to the Post Office after his time as a code breaker, where he was involved in developing the pioneering electronic telephone exchange at Highgate Wood, and ERNIE, the random number generator used by Premium Bonds.

Alan Turing’s post-war work and legacy are even more significant. Until his death in 1954 Turing undertook pioneering work in computer development and programming, mathematical biology and morphogenesis. He also developed the “Turing Test” for artificial intelligence, which states that a machine can only be said to be intelligent if its behaviours are indistinguishable from that of a human being.

A stamp from The Inventors' Tale issue, 12 January 1999. 63p – Computer inside Human Head (Alan Turing's work on computers).

A stamp from The Inventors’ Tale issue, 12 January 1999. 63p – Computer inside Human Head (Alan Turing’s work on computers).

For this and his many achievements Alan Turing is often labelled a “genius”. A stamp from 1999, part of The Inventor’s Tale issue, is testament to this: it features E Paolozzi’s artwork Computers, portraying a computer inside a human head. It is one of many of Paolozzi’s artworks inspired by Alan Turing.

A stamp released earlier this year (pictured above) as part of the Britons of Distinction issue commemorates Turing’s work as a mathematician, computer scientist and code breaker. The stamp shows Turing’s “Bombe” code breaking machine at Bletchley Park.

2012 is Alan Turing Year, celebrating the life and work of Alan Turing.

Colossus and D-Day

65 years ago today General Dwight D. Eisenhower and his staff met to discuss the Normandy landings, or D-Day. The landings had been planned for some time and their success depended on good weather for the crossing and landing, and minimal resistance from German troops so that the Allies could gain a foothold.

Weather conditions had been too poor for a landing in early June 1944, but chief meteorologist James Martin Stagg forecast an improvement on 6th June. This weather forecast is usually cited as the deciding factor in Eisenhower’s decision to set D-Day for 6th June. However, Eisenhower is said to have received another piece of information during that meeting which was just as crucial, and he had the skill and inventiveness of the Post Office Research Station, Dollis Hill to thank for it.

Post Office engineers re-wire a telephone exchange after an air raid. Post Office telephone engineers developed the first programmable electronic computer during the 2nd World War.

Post Office engineers re-wire a telephone exchange after an air raid. Post Office telephone engineers developed the first programmable electronic computer during the 2nd World War.

Before the war Post Office engineer Tommy Flowers and his team at Dollis Hill had worked in switching electronics, exploring the possibilities for electronic telephone exchanges. But by the early 1940s they were helping the British code-breaking team at Bletchley Park. Colossus, later recognised as the world’s first programmable electronic computer, was their greatest achievement.

Colossus was primarily developed to decipher the Nazi Lorenz codes, high-level encryptions used by senior personnel, rather than the more famous Enigma codes used by field units. Computer technology was in its infancy in the 1940s and when in early 1943 Flowers proposed the machine, which would run on 1800 valves (vacuum tubes), there was great scepticism that it would work as until that point the most complicated electronic device had used about 150 valves.

But by December 1943 Colossus Mark 1 was working and it was soon moved to Bletchley Park, where it was able to break German codes within hours. An improved version, Colossus Mark 2, using 2400 valves, was unveiled on 1st June 1944, four days before Eisenhower made his decision about D-Day.

An essay by Flowers published in Colossus: The Secrets of Bletchley Park’s Code-breaking Computers describes the crucial meeting between General Eisenhower and his staff held on 5th June 1944. During that meeting a note summarising a recent Colossus decryption was handed to Eisenhower. It confirmed that Hitler was aware of troop build-ups in southern England, but would not be sending extra troops to Normandy as he was certain that Allied preparations were a hoax. This information was said to have convinced Eisenhower that the Normandy landings should take place the next day.

But whether it was the weather forecast or the Colossus decryption which tipped the balance in favour of 6th June, Flowers and the Post Office Research Station team made a remarkable advance in computer technology. By the end of the war 10 Colossus Mark 2 computers were in use at Bletchley Park, providing vital information to Allies forces, which certainly reduced the length of the war. After the war Flowers and his team returned to their work in switching, later pioneering all-electronic telephone exchanges. Their ingenuity was only recognised in the 1970s when restrictions on the Colossus project under the Official Secrets Act were lifted.