I was observing her closely as I talked, and after a while I began to get the impression that she was not, in fact, quite so merry and smiling a girl as I had been led to believe at first. She seemed to be coiled in herself, as though with a secret she was jealously guarding. The deep-blue eyes moved too quickly about the room, never settling or resting on one thing for more than a moment; and over all her face, though so faint that they might not even have been there, those small downward lines of sorrow.
Roald Dahl (1979). “Tales of the unexpected”