“…160 In order to differentiate GPI from melancholia, Mickle advised that: Some of the somatic signs of GPI, the fact that the patients rarely maintain complete silence, that they show less of that rigid, fixed, contraction of the lineaments, and deep furrowing of the lines of expression, that is usually seen in the simple form of melancholia with stupor, are distinctive points. 161 In addition, Maurice Craig, a physician and lecturer in psychological medicine at Guy's Hospital, London, pointed out that:…”