All mere matters of memory. The very alphabet shows the richness of the language. There are twenty-nine letters, besides vowel points; and each letter is written in four different ways, so that it is different when isolated, when in the beginning, middle, or end of a word. It took me some hours to learn them. In very many respects, it is closely allied to the Hebrew, so that everybody who writes Hebrew grammars and lexicons necessarily has much to do with Arabic; and a knowledge of it may be of great use in clearing up difficulties in the Bible. My year in Oxford will enable me to go on with it, for in three weeks more I hope to be able to go on alone. To-morrow I begin the Koran. My lessons will not in all exceed 31; and I really should have gone on, perhaps, not much faster with Hebrew if I had worked it exclusively; and it is hard to read so many hours at one thing: and I may say, now without doubt, that I have laid the foundation for a study of Oriental languages, if I have time and opportunity that may be fairly given to them. Think what one hour a day is, and the pleasure to me is very great, and I feel that I have a knack rather (if I may say so) of laying hold of these things. Don't mention it to anyone.' There the fragment breaks off; and in a letter of August 29 there occurs this reply to a message from his eldest sister:-- 'Thank dear Joan for her caution: I know I need it sadly, especially now when I am at work upon somewhat out-of-the-way subjects, and feel the danger of forgetting that if I mistake the means for the end, and feel gratified with the mere intellectual amusement, I am doing very wrong, even when I am working very hard at very difficult matters. I like these things, I must confess, and the time is so well adapted to work here, and now that the weather is cool I can secure every day a good long time to myself.' In the enclosed letter he announces that he shall leave Dresden in another three weeks. He says:--