A decade ago Alan Turing, when he was discussed at all, was primarily talked about by mathematicians and computer scientists. However, a much publicized pardon from Queen Elizabeth in 2013 and a critically acclaimed film starring Benedict Cumberbatch have brought Turing close to being a household name.

Turing, a British mathematician, logician, cryptanalyst, philosopher and mathematical biologist is credit with pioneering the fields of computer science and artificial intelligence. During World War II worked for the Government Code and Cypher School (GC&CS) at Bletchley Park, attempting to crack German codes. Turing is credited with cracking the German Enigma code, which is believed to have shortened the war by years.

In 1952 Turing was convicted in Britain of being a homosexual and chemically castrated. He committed suicide in 1954, just days before his 42nd birthday.

After Turing’s death, his papers passed to his friend Robin Gandy, a respected mathematician in his own right. Gandy, in turn, passed most of the papers on to King’s College. One of the things he held back was a journal, kept by Turing during 1942 while he was working as a codebreaker.

Gandy used the remaining pages of the journal as a dream journal.

“The book then became something else — simultaneously a priceless look into the mind of Turing’s work during a critical period of his career, and a deeply personal journal containing Gandy’s waking reflections on his own dreams,” said Abby Ohlheiser of the Washington Post.

Because of the personal nature of the dream entries, the journal remained in Gandy’s possession until his death in 1995.

On April 13, the auction house Bonhams will sell the book. At this point the seller and the charity the proceeds are going to support both remain anonymous.

“Alan Turing was parsimonious with his words and everything from his pen has special value. This notebook shines extra light on how, even when he was enmeshed in great world events, he remained committed to free-thinking work in pure mathematics,” said Turing scholar Andrew Hodges in a statement.

Hodges is the author of “Alan Turing: The Enigma” which was the basis for the film “The Imitation Game” starring Benedict Cumberbatch and Keira Knightley which has recently been nominated for eight Academy Awards.

“Alan Turing was a war hero, who broke the Enigma code helping to bring an end to World War II, the father of modern computing science, and a gay icon who lived in a time of intolerance and tragically committed suicide as a result. His impact on our everyday lives is enormous, and the thought of being able to hold a manuscript that was written by him is thrilling,” said Cumberbatch.

The publicity surrounding the film is expected to drive the price of the journal into seven figures. A letter from Francis Crick, discoverer of DNA, explaining the double helix to his son was sold by Christie’s auction house for $6 million.

For those without millions of dollars to spend, the Turing Digital Archive contains the bulk of Turing’s papers which Gandy turned over to King’s College, Cambridge. More than 3000 papers, articles, photographs and letters can be viewed at TuringArchive.org.