text:  I'm curious, did George Gershwin do this? No. I've never seen a collection with this much organized detail. So a treasure trove, but also one in which the detail is sometimes puzzling. Blocks of letters, say, in some of the margins. He would write out melodies next to his lyric sketches, but as lettered notes. So C, A, B-flat, C, A, E-flat, that kind of thing.