These chapters are for children, and I shall try to make the words large enough to command respect. In the hope that you are listening, and that you have confidence in me, I will proceed. Dates are difficult things to acquire; and after they are acquired it is difficult to keep them in the head. But they are very valuable. They are like the cattle-pens of a ranch -- they shut in the several brands of historical cattle, each within its own fence, and keep them from getting mixed together. Dates are hard to remember because they consist of figures; figures are monotonously unstriking in appearance, and they don't take hold, they form no pictures, and so they give the eye no chance to help. Pictures are the thing. Pictures can make dates stick. They can make nearly anything stick -- particularly if you make the pictures yourself. Indeed, that is the great point -- make the pictures yourself. I know about this from experience. Thirty years ago I was delivering a memorized lecture every night, and every night I had to help myself with a page of notes to keep from getting myself mixed. The notes consisted of beginnings of sentences, and were eleven in number, and they ran something like this:

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