Original sketch in pencil on an off-white page, about 5.5 x 8.5, signed and inscribed, “Kay OHyra/by/Blackstone/10-23-1945.”  Very good condition, with scattered light creasing and handling bends, one bend intersecting the first letter of the signature.  The creasing slightly detracts from overall appearance but does not touch the sketch.  Uncommon in this format.