Perhaps the greatest trouble when revising was given by the question of wireless. Sir Walter was a man of letters. He was intensely interested in anything and everything, however, and was not content to accept any technical facts. He wanted to understand them. He was a constant interrogative. Indeed it seemed sometimes as he curled his long body into curious shapes in his chair that he formed a note of interrogation. This question of the why? was no new developed one. He once told me that when as a small boy he was sent to a governess, he was given a Latin grammar and severely told to learn the first declension. The word meant nothing to him. “Please what’s a declension?” he asked. “_That’s_ a declension, and you just learn it,” was the reply. But the answer was inadequate and Sir Walter took no further interest in the lesson. He could not learn where he was not interested. It was no use talking to him about “coherers” and “microhenries.” His only comment would be that “microhenries” were far better called “harries” for short. So when after Chapter V had been written Captain Morris found new and interesting information on the use of wireless telegraphy in aircraft in the days before the war, the whole of this difficult chapter had to be reopened for new patching. “In regard to wireless,” he wrote, “I am like a blind man who has never talked to painters employed to write a critique of a picture exhibition. It’s paralysing. The only escape is to keep on broad lines. Every one knows that wireless sends messages. I shall be happier when _events_ begin again.” “I think I had better come up for a day and have a long talk with you instead of writing what will have to be rewritten.” But he got to work on wireless, and on May the 9th, “I have written about twenty or more of my pages on wireless. I believe I have made it much clearer and simpler _than it is_. I have arranged to come to London on Monday, June 20, bringing Chapter V (which is the devil) and as much more as I can. VI will be plainer sailing.” But before he came to London he struggled on with the wireless history. On May the 24th he wrote, “I fear I shall make you impatient. I can go on, if I have to, and copy the statements I have. But if I were a reader of the book, it would annoy me by avoiding the questions that naturally suggest themselves to an intelligent reader who has had no technical education,” and two days later, “I know from long experience that any one who attempts accurately to repeat what he does not understand never repeats it accurately.... If I could get my brain tuned to the wave-lengths of all these papers, something would begin to come through. All the oscillations of my mind are strongly damped, but I hope soon to get an oscillating current of high frequency.... After all it’s very little I need write about the process and instruments.... What is Rouzet’s full name?”