Read it through once

I wrote the foregoing about three years ago, in Heidelberg, and laid the manuscript aside, purposing to add to it instances of mind-telegraphing from time to time as they should fall under my experience. Meantime the ‘crossing’ of letters has been so frequent as to become monotonous. However, I have managed to get something useful out of this hint; for now, when I get tired of waiting upon a man whom I very much wish to hear from, I sit down and _compel_ him to write, whether he wants to or not; that is to say, I sit down and write him, and then tear my letter up, satisfied that my act has forced him to write me at the same moment. I do not need to mail my letter—the writing it is the only essential thing.