Electron diffraction has been conducted in free-standing films of 4-n-heptyloxybenzylidene-4-n-heptylaniline (70.7). We report an unusual phenomenon in these films in which a tilted hexatic smectic-I phase can develop an orthogonal crystal-B outermost layer before transforming entirely into the crystal-B phase, to be followed by the freezing of the smectic-A interior, The adjacent crystal-B and smectic-I layers show evidence of orientational epitaxy.