Indeed, it is certain that the thought not only presented itself to him sometimes, but was familiar. "At our last meeting," writes his school-fellow of Stanislas days, Lieutenant Constantin, "I had been struck by his melancholy expression, and yet he had just been victorious for the forty-seventh time. 'I have been too lucky,' he said to me, 'and I feel as if I must pay for it.' 'Nonsense,' I replied, 'I am absolutely certain that nothing will happen to you.' He smiled as if he did not believe me, but I knew that he was haunted by the idea, and avoided everything that might uselessly consume a particle of his energy or disturb his sang-froid, which he intended to devote entirely to Boche hunting."[27] [Footnote 27: Unpublished notes by J. Constantin.] When had he ceased to think himself invincible? The reader no doubt remembers how he recovered from his wound at Verdun, and the shock it might have left, merely by flying and offering himself to the enemy's fire with the firm resolve not to return it. Eight times he had been brought down, and each time with full and prolonged consciousness of what was happening. On many occasions he had come back to camp with bullets in his machine, or in his combination. Yet these narrow escapes never reacted on his imagination, damped his spirit, or diminished his _furia_. But had he thought himself invincible? He believed in his star, no doubt, but he knew he was only a man. One of his most intimate friends, his rival in glory, the nearest to him since the loss of Dorme, the one who was the Oliver to this Roland, once received this confidence from Guynemer: "One of the fellows told me that when he starts up he only thinks of the fighting before him; he found that sufficiently absorbing; but I told him that when the men start my motor I always make a sign to the fellows standing around. 'Yes, I have seen it,' he answered; 'the handshake of the airman. It means _au revoir_.' But maybe it is farewell I am inwardly saying," Guynemer added, and laughed, for the boy in him was never far from the man. * * * * * Towards the end of July, while he was in Paris seeing to the repairs for his machine after bringing down his fiftieth enemy, he had gone to Compiegne for a short visit. His father, knowing his technical ability and his interest in all mechanical improvements, and on the other hand noticing a nervousness in his manner, dared for the first time to hint timidly and allusively at the possibility of his being useful in some other field. "Couldn't you be of service with respect to making engines, etc.?" But he was embarrassed by his son's look of questioning surprise. Every time Guynemer had used his father's influence in the army, it had been to bring himself nearer to danger.