Of his first dog, he always said that they stood more in the relation of brothers than master and dog; and the dog felt a guardian care of him. The different characters of his two Newfoundland dogs, and of the smaller ones he had later, interested him, for they were singularly different, though both the Newfoundlands shared his affection for a pretty Maltese cat who had succeeded the other cats; they were especially fond of her kittens and attentive to them, allowing them all sorts of liberties. The cats and dogs always lived affectionately together. Dr. Gray always recognized their good consciences, which varied somewhat with the different type of animal, and considered that the size of different breeds had much to do with their characteristics. They always learned to eat what their master did; not so much, he would say, from any preference for oysters and dry toast, as that they were ambitious to do as far as possible what he did. He was very skillful in the handling of animals, and they recognized it in allowing him to perform small surgical operations, to dress wounds, etc., with a touching trust and submission. TO GEORGE BENTHAM. March 9, 1858. MY DEAR BENTHAM,--Many thanks for yours of February 14. Although much pleased to hear from you, I cannot expect to hear often, unless you have something special to say. No one but Hooker can write long and frequent letters while he is doing such a vast amount of work, and keeping up such a fresh, and keen, and scrutinizing interest in such a great variety of subjects. I wonder how he does it. How well oiled the machinery of his brain must be to do it all without great wear and tear! If you or I had half these matters to think of at once, we should go distracted. Warn Hooker to take good care of himself and not break down in health. It is a facility which he inherits, that of turning from one thing to another without loss of time or of working power. I shall be pleased to see the “Handbook” when it is out. Never mind what people say. I dare say the little book will do a great deal of good.... I am glad you will distribute more of Spruce’s plants. I want especially any of his Andes collections, for Baños was one of our Exploring Expedition stations. I am going to finish up our Exploring Expedition this year (D. V.), and have done with it. That and some other things done, and I dream of coming over to England, and working at nothing but “North American Flora,” de novo. I hope I may, and that I shall find you and Mrs. B. as fresh as ever, and enjoying yourselves to the full.... April 26. My last book[37] in elementary botany is now just off my hands, and will be out in a fortnight. I hope it will be of use. Forgive me for writing horn-books, and I am now done with that sort of work. There were several convincing reasons for doing it. TO DANIEL CADY EATON.[38] February 23, 1858.