“At last, by the greatest piece of good fortune, I was obliged to go abroad. The change, and the obligation to occupy myself about many affairs, was an incalculable blessing to me. While travelling I was struck with the remarkable and tropical beauty of the insects, and especially of the butterflies. I captured a few, and brought them home. On showing them to a friend, learned in such matters, I discovered that they were rare, and I had a little cabinet made for them. I looked into the books, found what it was which I had got, and what I had not got. “Next year it was my duty to go abroad again, and I went with some feeling akin to pleasure, for I wished to add to my store. I increased it considerably, and by the time I returned I had as fine a show as any private person might wish to possess. A good deal of my satisfaction, perhaps, was unaccountable, and no rational explanation can be given of it. But men should not be too curious in analysing and condemning any means which Nature devises to save them from themselves, whether it be coins, old books, curiosities, butterflies, or fossils. And yet my newly-acquired passion was not altogether inexplicable. I was the owner of something which other persons did not own, and in a little while, in my own limited domain, I was supreme. No man either can study any particular science thoroughly without transcending it; and it is an utter mistake to suppose that, because a student sticks to any one branch, he necessarily becomes contracted. “However, I am not going to philosophise; I do not like it. All I can say is, that I shun all those metaphysical speculations of former years as I would a path which leads to madness. Other people may be able to occupy themselves with them and be happy; I cannot. I find quite enough in my butterflies to exercise my wonder, and yet, on the other hand, my study is not a mere vacant, profitless stare. When you saw me that morning, I was trying to obtain an example which I have long wanted to fill up a gap. I have looked for it for years, but have missed it. But I know it has been seen lately where we met, and I shall triumph at last.” A good deal of all this was to me incomprehensible. It seemed mere solemn trifling compared with the investigation of those great questions with which I had been occupied, but I could not resist the contagion of my friend’s enthusiasm when he took me to his little library and identified his treasures with pride, pointing out at the same time those in which he was deficient. He was specially exultant over one minute creature which he had caught himself, which he had not as yet seen figured, and he proposed going to the British Museum almost on purpose to see if he could find it there.