For Gertrude Stein and her companion Alice B. Toklas, life in Paris was based upon the rue de Fleurus and the Saturday evenings, and 'it was like a kaleidoscope slowly turning'. Picasso was there with 'his high whinnying spanish giggle', as were Cezanne and Matisse, Hemingway and Fitzgerald. As Toklas put it – 'The geniuses came and talked to Gertrude Stein and the wives sat with me.' A light...