Once again. Let us turn for a moment to the Mediterranean shores of Spain, and the mountains of Murcia. Those rocky heights, whose peaks stand out against the deep blue sky, scarcely support a blade of vegetation. The algarobas and olives at their bases are artificially supplied with soil. It is scarcely credible that these are the same mountains which, according to the forest-book of King Alfonso el Sabio, were once clothed to their summits with pines and other forest trees, while soft clouds and mist hung over a rounded, shaggy outline of wood where now the naked rocks make a hard line against the burnished sky. But Arab and Spanish chroniclers alike record the facts, and geographical science explains the cause. There is scarcely a district in the whole range of the civilized world where some equally interesting geographical story has not been recorded, and where the same valuable lessons may not be taught. This is comparative geography. [Illustration: OUR POST-OFFICE BOX.] That our youthful correspondents may not think we slight any of their favors, we would say that we regret exceedingly that our limited space compels us to print so few of their prettily worded and neatly written letters. We thank you all for your praise and hearty goodwill, but while we read all your comments on _Young People_ with attention, as in that way we learn what pleases you best, we must choose for printing those letters which tell something of interest to other young readers. To one thing we would call your attention. When you send drawings of "Wiggles" and other picture puzzles, be careful to do it on a separate piece of paper. Your letters are all recorded, and filed away, and if your idea for a "Wiggle" is drawn on the same piece of paper on which you write your letter, it makes confusion. We hope our young correspondents will pay attention to this suggestion. * * * * * ISHPEMING, MICHIGAN. In _Harper's Young People_, No. 10, Mr. Lossing wrote about "Putnam's Narrow Escape." He said his informant was General Ebenezer Mead. Please tell Mr. Lossing that General Mead was my great-grandfather. I am nine years old. I was born in Evergreen, Louisiana, and came North when I was only three weeks old, so I don't remember about any home but where I live now. BEN BRYANT HILL. * * * * * DEL NORTE, COLORADO. I am ten years old, and live away out in the Rocky Mountains. I went down to the hotel last night, and saw the twelve Ute chiefs who are on the way to Washington. Ouray, the head chief, had his wife with him. There being but one chair in the room, she very kindly sat flat upon the floor, and allowed her husband to occupy the chair. WALLACE S. * * * * * SHEEPSCOTT BRIDGE, MAINE.