They were often together, and sometimes with Alan's friends, although Neville then felt rather out of place.
Neville joined in the game of poker that they determinedly played in order to test out Alan's minimax strategy.
(It was not very exciting, as the strategy was largely the obvious one anyway.)
In other ways, Alan was back to the difficulties of 1939.
For his mind still straddled mathematics, engineering and philosophy in a way that the academic structure could not accommodate.
Temporarily the war had resolved his frustration, giving him something to do that was intellectually satisfying, yet which actually worked.
But that was over now, and instead of being drawn in, he was being pushed out.
How was he to continue, having won the war, and lost the peace?
If he did not return to the NPL then the Entscheidungs problem lay between Cambridge and Manchester.
He could stay at King's, and a lectureship ought to come his way.
He could return to the world of Hilbert and Hardy, as though the last nine years had never been.
Yet no more than in 1939, was that the way his spirit moved.
He did not want to go backwards, and he still wanted to grasp the computer that he had invented.
At Cambridge, the computer was firmly in the grasp of M. V. Wilkes, and Alan was far, far too proud to go cap in hand to use it.
If he wanted a computer, it meant going to Manchester.