POTTER, BEATRIX. The Sly Old Cat. [Foreword by Leslie Linder]. London and New York: Frederick Warne. Color illustrated. Small 8vo, original color pictorial white boards, slightly bowed; dust jacket. FIRST EDITION, PRESENTATION COPY, inscribed by contributor Leslie Linder on the front free endpaper: ''For Margaret [Hammond] with love and best wishes from Leslie November 2nd 1971.''