sentences:  Dreier had been a colleague of Rebay's.The works included "Little French Girl" (1914–18) by Brâncuși, an untitled still life (1916) by Juan Gris, a bronze sculpture (1919) by Alexander Archipenko and three collages (1919–21) by German Hanoverian Dadaist Schwitters.It also included works by Calder, Marcel Duchamp, El Lissitzky and Mondrian.