But if it was evidence of ill-feeling between the two men I was after he could give me none. Indeed, the probabilities were all the other way. In other Services the bond between man and man is strict, but there is still room for preferences and aversions. Your mess, for example, is yours, and you are filled with a jealous pride if an outsider has anything to say about it; but within its circle you pick and choose your friends. The ward-room forces you into the closest physical contacts, but you can still please yourself about the other intimacies. Even in a submarine, where the death of one is likely to be the death of all, you may yet like one man more than another. But two men in an aeroplane are twins in a womb. The very pulse of one must be the pulse of both, their senses, glances, thoughts, such a unison of coöperation as the former world never saw. For one to harm the other is not assault, but semi-suicide. Rarely need you even "look for the woman." Gloriana both serve, but they hardly quarrel about lesser mistresses. Yet is it not possible that this extraordinary attachment, this association somewhat in excess of that of natural and aeroplaneless man, may by its very nature have its own reactions? The closer the tie the bitterer the quarrel when it does come. And here an artificial element is superadded. For, in spite of Joan, who thought that Chummy simply thought of her and flew, man does not naturally fly. If nothing else forced him into accord the mere mechanical risks would be enough to do so. I remember Smith told me that at one time--whether this is still the case I cannot say--an observer was not allowed to be trained as a pilot also, lest, seeing his comrade doing something he himself would not have done and conscious of the functioning of a different mind, he should lose his head at a critical moment and instinctively seize the controls. Had there been such a dissolution of unity on that morning of the breakfast-party? Had hand hesitated, this factitious identity suddenly failed? Of all men living Charles Valentine Smith was the only one who could answer these questions with authority; but I wanted to get all I could out of Hanson. "Had Maxwell his pilot's ticket?" I musingly asked him presently. "Couldn't say. Lots of them have flown hundreds of miles without a ticket at all." "Was he an Aiglon Company man, by the way?" "Dunno. If he was he probably had his ticket. I can't see what use a commercial Company would have for a bomb-sight specialist." "Oh, they might. You never know." "Well, perhaps so. I'm sorry, old son, but you know as much about poor old Bobby as I do now." Summarized, this was all the information I got in exchange for my lunch:-- Maxwell was four or five years older than Smith, in civil life a surveyor, unmarried, not (so far as Hanson knew) engaged to be married, nice fellow, reasonably abstemious, quite sound in wind and limb.