Well, I've written a bass method book that's out of print, and has been for a long time, but Ray Brown studied out of my book, and when I met Ray Brown he was playing with Dizzy Gillespie's big band on 52nd street. And I think it was the first time Ray Brown had ever been to New York. I don't know were he's from originally, but he was a marvelous player at that time. He was about eighteen years old. And he came over to the table and my wife and I were there listening to Louis', uh, Dizzy Gillespie's big band, and Ray Brown said "I studied out of your book, Mr. Haggart. " He called me Mr. Haggart. I said, "I better go take another look at that book, I must have missed something. " Because he was playing all over that bass, stuff that he never found in that book, that's for sure. So but you can't really learn to play out of books I don't think. I think it's good to get you started, find out where the notes are so that when the time comes and you have to read a bass part. You seldom read what's there anyway, you have to use your ear and play what you think it should be. As long as you know what chords are happening, and the way the tune is constructed, those are things you learn when you're a kid you see, how to train your ear and to remember chord sequences. You have to store all those tunes in your head so that when they call out a tune you can't say "I don't know it, what else do you know, what else? " And then you say "well I don't know that either...what else? " You've got to know everything. If you're going to play in a band you have to know every tune. I don't know how you do that. It's just something that takes a long time. Now these kids today, they know all those tunes, the ones I mentioned before, you know? Howard Alden, he's got some kind of a brain because he not only remembers the tunes but he remembers all the choruses that Lester Young played. He'll play them all. He and Flip Phillips play unison lines exactly like Lester Young did in 1935, you know? It's possible to store all kinds of information in your head I'm told. But I could never do that.