We often met for dinner in the Café de L’Opera, and he would tell me of his colour photography – he had made a wonderful series of colour photographs of trench feet – or his new range finder, or even of a bomb which he had designed. He quickly realized the need of X-rays nearer the fighting line, and with characteristic energy raised funds, designed, and had made a travelling, self-contained X-ray lorry; this entailed a vast amount of work, first to obtain official sanction, and then to get the unit made. Many visits to Paris were necessary for the special electrical apparatus, but in the autumn Lang went up the line in charge of No. 1. Mobile X-ray unit, which he used later to examine the King after his fall from a horse. His carrying out of the idea was original and, as events proved, extremely useful; it was adopted later by the War Office, though the pattern was not exactly copied as French apparatus had been used. It was at times such as this that one realized the extraordinary mental and physical energy of Basil Lang: he was always striving after something better.