I am sorry that King made you uneasy about me. He does not understand me as you do, and you must not heed him so much. He thinks that I am melancholy and above all that I require polishing. I feel sure that if you were here to see how happy I am and how ardently I am seeking a knowledge of the rocks, you could not call me away but would gladly let me go with only God and his written rocks to guide me. You would not think of calling me to make machines or a home, or of rubbing me against other minds, or of setting me up for measurement. No, dear friend, you would say: “Keep your mind untrammelled and pure. Go unfrictioned, unmeasured, and God give you the true meaning and interpretation of his mountains.” You know that for the last three years I have been ploddingly making observations about this valley and the high mountain region to the east of it, drifting broodingly about and taking in every natural lesson that I was fitted to absorb. In particular the great valley has always kept a place in my mind. What tools did he use? How did he apply them and when? I considered the sky above it and all of its opening cañons, and studied the forces that came in by every door that I saw standing open, but I could get no light. Then I said: “You are attempting what is not possible for you to accomplish. Yosemite is the _end_ of a grand chapter; if you would learn to read it, go commence at the beginning.” Then I went above to the alphabet valleys of the summits, comparing cañon with cañon, with all their varieties of rock-structure and cleavage and the comparative size and slope of the glaciers and waters which they contained; also the grand congregations of rock-creations was present to me, and I studied their forms and sculpture. I soon had a key to every Yosemite rock and perpendicular and sloping wall. The grandeur of these forces and their glorious results overpower me and inhabit my whole being. Waking or sleeping, I have no rest. In dreams I read blurred sheets of glacial writing, or follow lines of cleavage, or struggle with the difficulties of some extraordinary rock-form. Now it is clear that woe is me if I do not drown this tendency towards nervous prostration by constant labor in working up the details of this whole question. I have been down from the upper rocks only three days and am hungry for exercise already. Prof. Runkle, president of the Boston Institute of Technology, was here last week, and I preached my glacial theory to him for five days, taking him into the cañon of the valley and up among the grand glacier wombs and pathways of the summit. He was fully convinced of the truth of my readings and urged me to write out the glacial system of Yosemite and its tributaries for the Boston Academy of Science. I told him that I meant to write my thoughts for my own use and that I would send him the manuscript, and if he and his wise scientific brothers thought it of sufficient interest they might publish it.