My work was, to begin with, very largely theoretical. I was able to attack such early necessities of verification as arose with quite little models, using a turntable to get the motion through the air, and cane, whalebone and silk as building material. But a time came when incalculable factors crept in, factors of human capacity and factors of insufficient experimental knowledge, when one must needs guess and try. Then I had to enlarge the scale of my operations, and soon I had enlarged them very greatly. I set to work almost concurrently on the balance and stability of gliders and upon the steering of inflated bags, the latter a particularly expensive branch of work. I was no doubt moved by something of the same spirit of lavish expenditure that was running away with my uncle in these developments. Presently my establishment above Lady Grove had grown to a painted wood chalet big enough to accommodate six men, and in which I would sometimes live for three weeks together; to a gasometer, to a motor-house, to three big corrugated-roofed sheds and lock-up houses, to a stage from which to start gliders, to a workshop and so forth. A rough road was made. We brought up gas from Cheaping and electricity from Woking, which place I found also afforded a friendly workshop for larger operations than I could manage. I had the luck also to find a man who seemed my heaven-sent second-in-command—Cothope his name was. He was a self-educated-man; he had formerly been a sapper and he was one of the best and handiest working engineers alive. Without him I do not think I could have achieved half what I have done. At times he has been not so much my assistant as my collaborator, and has followed my fortunes to this day. Other men came and went as I needed them. I do not know how far it is possible to convey to any one who has not experienced it, the peculiar interest, the peculiar satisfaction that lies in a sustained research when one is not hampered by want of money. It is a different thing from any other sort of human effort. You are free from the exasperating conflict with your fellow-creatures altogether—at least so far as the essential work goes; that for me is its peculiar merit. Scientific truth is the remotest of mistresses; she hides in strange places, she is attained by tortuous and laborious roads, but _she is always there!_ Win to her and she will not fail you; she is yours and mankind’s for ever. She is reality, the one reality I have found in this strange disorder of existence. She will not sulk with you nor misunderstand you nor cheat you of your reward upon some petty doubt. You cannot change her by advertisement or clamour, nor stifle her in vulgarities. Things grow under your hands when you serve her, things that are permanent as nothing else is permanent in the whole life of man. That, I think, is the peculiar satisfaction of science and its enduring reward....