Suppose you set to work somewhat in this way to gather references on "Thinking:" First you look over your book titles, and there is Schaeffer's "Thinking and Learning to Think." Near it is Kramer's "Talks to Students on the Art of Study"--that seems likely to provide some material, and it does. Naturally you think next of your book on psychology, and there is help there. If you have a volume on the human intellect you will have already turned to it. Suddenly you remember your encyclopedia and your dictionary of quotations--and now material fairly rains upon you; the problem is what not to use. In the encyclopedia you turn to every reference that includes or touches or even suggests "thinking;" and in the dictionary of quotations you do the same. The latter volume you find peculiarly helpful because it suggests several volumes to you that are on your own shelves--you never would have thought to look in them for references on this subject. Even fiction will supply help, but especially books of essays and biography. Be aware of your own resources.
To make a general index to your library does away with the necessity for indexing individual volumes that are not already indexed.
To begin with, keep a note-book by you; or small cards and paper cuttings in your pocket and on your desk will serve as well. The same note-book that records the impressions of your own experiences and thoughts will be enriched by the ideas of others.
To be sure, this note-book habit means labor, but remember that more speeches have been spoiled by half-hearted preparation than by lack of talent. Laziness is an own-brother to Over-confidence, and both are your inveterate enemies, though they pretend to be soothing friends.
Conserve your material by indexing every good idea on cards, thus:
[HW:
Socialism
Progress of S., Env. 16 S. a fallacy, 96/210 General article on S., Howells', Dec. 1913 "Socialism and the Franchise," Forbes "Socialism in Ancient Life," Original Ms., Env. 102
]
On the card illustrated above, clippings are indexed by giving the number of the envelope in which they are filed. The envelopes may be of any size desired and kept in any convenient receptacle. On the foregoing example, "Progress of S., Envelope 16," will represent a clipping, filed in Envelope 16, which is, of course, numbered arbitrarily.
The fractions refer to books in your library--the numerator being the book-number, the denominator referring to the page. Thus, "S. a fallacy, 96/210," refers to page 210 of volume 96 in your library. By some arbitrary sign--say red ink--you may even index a reference in a public library book.
If you preserve your magazines, important articles may be indexed by month and year. An entire volume on a subject may be indicated like the imaginary book by "Forbes." If you clip the articles, it is better to index them according to the envelope system.
Your own writings and notes may be filed in envelopes with the clippings or in a separate series.
Another good indexing system combines the library index with the "scrap," or clipping, system by making the outside of the envelope serve the same purpose as the card for the indexing of books, magazines, clippings and manuscripts, the latter two classes of material being enclosed in the envelopes that index them, and all filed alphabetically.
When your cards accumulate so as to make ready reference difficult under a single alphabet, you may subdivide each letter by subordinate guide cards marked by the vowels, A, E, I, O, U. Thus, "Antiquities" would be filed under i in A, because A begins the word, and the second letter, n, comes after the vowel i in the alphabet, but before o. In the same manner, "Beecher" would be filed under e in B; and "Hydrogen" would come under u in H.
Outlining the Address
