Animals

From 1963 to 1970, almost the whole of the writing, 31 songs use it. It begins on 'Money (That's What I Want)' and finishes on 'Dig a Pony', with The Beatles (The White Album) leaning on it hardest, thirteen of its 30 tracks. It turns up most in 1967 and 1968, eighteen of the 30 between them, and only four come after, the last of them 'Dig a Pony'. Lennon wrote eighteen of them, such as 'A Hard Day's Night' and 'Come Together', 17% of his songs against 6% of McCartney's. On 'Mother Nature's Son' it is Maharishi lecture-source mentions and not in lyric. On 'Martha My Dear': named after McCartney's sheepdog Martha.