[ Autographs ] IGOR SIKORSKY T.L.S. on Sikorsky Aircraft letterhead, 1p. 4to., Stratford, June 2, 1972 to Rear Admiral T. R. McClellan asking that he relate to NAVAIR his thanks for their birthday congratulations, adding: "...For my eighty-three years I am feeling well enough and still continue with my work as engineering consultantto this company..." Fine.