The couple lived in a one bedroom apartment above Sylvia Beach's bookshop Shakespeare and Company. Beach described him "as fellow with bangs, a squished nose and a big mouth with a grin in it. A regular American high school boy." She was very supportive, and introduced Antheil to her circle of friends and customers including Erik Satie, Ezra Pound, James Joyce, Virgil Thomson, and Ernest Hemingway. Joyce and Pound were soon talking of an opera collaboration. Pound, in particular, was to become an extravagant supporter and promoter of Antheil and his work, comparing him variously to Stravinsky and James Cagney, and describing him as breaking down music to its "musical atom". Pound introduced Antheil to Jean Cocteau, who in turn helped launch Antheil into the musical salons of Paris; Pound also commissioned Antheil to write three violin sonatas for his mistress, Olga Rudge. In 1924, Pound published "Antheil and the Treatise on Harmony", as part of his campaign to boost Antheil's reputation. The book may have done Antheil more harm than good, and the composer was to distance himself from it in his memoir. Natalie Barney helped produce some original works, including the First String Quartet in 1925.