W. P. W.--Your case is easy to understand, if it is true that you have heart disease. What do you eat, and how do you eat it? Do you swallow down a cup of tea and a bite of something for breakfast before rushing off to catch your train? Do you snatch a hasty lunch at any hour at which you are at leisure? or do you forego lunch altogether, and take nothing between breakfast and dinner? If you are guilty of any of these acts of indiscretion, you must expect to suffer. Your unpleasant symptoms are probably in the main due to errors of diet. You must be very careful about your feeding; never take any indigestible food; never eat in a hurry, and never, not if a whole year's income depends upon it, must you run off directly after a meal to catch a train. You should eat slowly; little at a time and often, and take at least four meals a day. You should take tea in great moderation, and you should carefully guard against constipation from any cause. E. T.--What is the size of the spot on your chin? If it is small, it is a "spider nævus," and can be readily removed by touching its centre with a red-hot needle. Of course this must be done by a surgeon. No other form of treatment is of any avail. If the spot is larger than a split pea, it can hardly be removed in this way, but it will probably be amenable to some other form of surgical procedure. In any case we advise you to go to a surgeon about it, and not to try to meddle with it yourself, for you can do no good by external application. MIZPAH.--We cannot advertise any special soap in this column. All soap used for the skin should be hard, opaque or semi-opaque, and either scented or medicated with carbolic acid, tar, etc. Never use any patent soap, and above all, never use arsenical soap. STUDY AND STUDIO. AJAX.--It is delightful and rare for us to be able to offer musical commendation twice consecutively. Your compositions are good enough for us to urge you, in reply to your question, at once to take harmony lessons. In spite of the merit of the chants, there are blemishes in them--consecutive fifths, etc.--which good teaching would enable you to avoid. We particularly like the close of the "Kyrie"; it is very musical. You should work hard, and may hope to succeed. TAM O' SHANTER.--1. Much depends on individual taste and preference in the selection of a subject to study alone. If you are fond of languages, we should advise you to take up Italian, and get Dr. Lemmi's Italian Grammar. You might with advantage join the National Home Reading Union. Address the Secretary, Surrey House, Victoria Embankment, London.--2. Your friend could certainly study French alone; if she could get a little help with the pronunciation, it would be better. We should recommend her to procure Havet's French Course. OUR OPEN LETTER BOX.