The easiest thing in the world is to write a song; the most difficult, to write a song that will be popular. I do not mean a "popular" song, but a song everybody will whistle—for few songs written for the populace really become songs of the people. The difference between poverty and opulence in the business of song-writing is—whistling.

What is the difference, then, between the man who can "write songs" and the one who can write songs everybody will whistle? Wherein lies the magic? Here is the difference, unexplained it is true, but at least clearly stated:

There are hundreds of men and women all over the land who can rhyme with facility. Anyone of them can take almost any idea you suggest off hand, and on the instant sing you a song that plays up that idea. These persons are the modern incarnations of the old time minstrels who wandered over the land and sang extemporaneous ditties in praise of their host for their dinners. But, remarkable as the gift is, many of these modern minstrels cannot for the life of them put into their songs that something which makes their hearers whistle it long after they leave. The whistle maker is the one who can rhyme with perhaps no more ease than these others, but into his song he is able to instil the magic—sometimes.

But what is this magic that makes of song-writing a mystery that even the genius cannot unerringly solve each time he tries? Not for one moment would I have you believe that I can solve the mystery for you. If I could, I should not be writing this chapter—I should be writing a song that could not fail of the greatest sale in history. Still, with the kind assistance of the gentlemen in the profession—as the prestidigitator used to say in the old town hall when he began his entertainment—I may be able to lift the outer veils of the unknown, and you may be able I to face the problem with clearer-seeing eyes.

I called for help first from Irving Berlin, without doubt the most successful popular song writer this country has ever known; then the assistance of phenomenally successful writers of such diverse genius as Charles K. Harris, L. Wolfe Gilbert, Ballard MacDonald, Joe McCarthy, Stanley Murphy, and Anatol Friedland, was asked and freely given. It is from their observations, as well as from my own, that the following elements of the art of whistle-making have been gathered.

Although we are interested only in the lyrics of the popular song, we must first consider the music, for the lyric writer is very often required to write words to music that has already been written. Therefore he must know the musical elements of his problem.

I. Music and Words are Inseparable

Think of any popular song-hit, and while you are recollecting just "how it goes," stand back from yourself and watch your mental processes. The words of the title first pop into your mind, do they not? Then do not you find yourself whistling that part of the music fitted to those words? Conversely, if the music comes into your mind first, the words seem to sing themselves. Now see if the bars of music you remember and whistle first are not the notes fitted to the title.

If these observations are correct, we have not only proof of the inseparable quality of the words and the music of a popular song, but also evidence to which you can personally testify regarding the foundations of lyric-writing.

But first let us hear what Berlin has to say about the inseparable quality of words and music: "The song writer who writes both words and music, has the advantage over the lyric writer who must fit his words to somebody else's music and the composer who must make his music fit someone else's words. Latitude—the mother of novelty—is denied them, and in consequence both lyrics and melody suffer. Since I write both words and music, I can compose them together and make them fit. I sacrifice one for the other. If I have a melody I want to use, I plug away at the lyrics until I make them fit the best parts of my music, and vice versa. "For instance: 'In My Harem' first came to me from the humorous possibility that the Greeks, who at that time were fighting with the Turks, might be the cause of a lot of harems running loose in Turkey. I tried to fit that phrase to a melody, but I couldn't. At last I got a melody; something that sounded catchy; a simple 'dum-te-de-dum.' I had it,