However, the lost-cause atmosphere began to undergo a change in 1948, when Sir Herbert Walker, the former general manager of the Southern Railway, which was taken over by British Railways in the nationalization program of that year, acted temporarily as chairman of the Channel Tunnel Company. Walker came to believe that the Channel-tunnel scheme could be a practical one in the postwar era, and he brought it to life again. Largely as a result of his persuasions, a Parliamentary study group began to look into the tunnel question once more, and the Channel Tunnel Company's lobbyists once more set about building up pro-tunnel opinion among M.P.s. It was just like old times for the pro-tunnelers, but with one significant difference. By the mid-fifties, it became clear that in the emerging age of rockets bearing nuclear warheads the traditional strategic arguments of the British military against the construction of a Channel tunnel would no longer have the same force that they had once had. And as for the old fears of military conscription in peacetime and high taxes, they had long ago been realized without a tunnel. It was therefore an event to make the hearts of all pro-tunnelers beat fast when, one day in February 1955, in the House of Commons, Harold Macmillan, then Minister of Defense, in answer to a parliamentary question as to whether the Government would have objections of a military nature to raise against a Channel tunnel, replied, "Scarcely at all." This seemed like a green light to D'Erlanger, but for a while he couldn't quite decide what to do after seeing it flash on. Early in 1956, however, he went to see Paul Leroy-Beaulieu, who was a director of the French Tunnel Company—the Société Concessionnaire du Chemin de Fer Sous-marin entre la France et l'Angleterre—and the grandson of Michel Chevalier, who had founded the company in 1875. D'Erlanger suggested that, since the tunnel was a common ancestral interest, the two of them have another try at promoting it. Leroy-Beaulieu agreed, and he suggested that as the Suez Canal Company's concession in Egypt was due to run out in 1968, and might not be renewed, the Suez Company might possibly be interested in turning to a Channel tunnel as its next project. Sure enough, the principals of the Suez Company, whose headquarters were in Paris, were interested in the idea, but the sudden seizure of the Canal by Colonel Nasser in July of that year kept them too distracted to pursue the tunnel project just then. In the meantime, quite independently of these tunnel developments in Paris and London, two young international lawyers in New York, Frank Davidson and Cyril Means, Jr., became intrigued by the possibility of a tunnel between England and France. Davidson and Means happened to have good connections in Wall Street, and after they established contact with the two existing tunnel companies by letter, Means went over to London and Paris early in February of 1957 to investigate the tunnel situation