Thalberg, Sigismund. (1812-1871). Autograph Letter Signed. Letter by the famous Austrian pianist and composer, to "Madame Singer" (see address at the end of the letter). In French. No date (written in Paris, as the letter tells). 2 pp. Small bifolium. "My wife is somewhat sick and has charged me with answering your friendly letter..." In fine condition.  6.5 x 4 inches (16 x 10.3 cm).