KLEE, Paul (1879-1940). Three autograph postcards signed ('Klee') to the painter Ernst Morgenthaler and his wife, [postmarked Bern, 'Ambulant', and Munich, 27 June - 2 October 1919], in the first expressing his disappointment that his stay will not be long enough for a visit to them, writing again later that year about a failed visit, and sending greetings, 2½ pages, 8vo. (3)