Dr Penrith

In the novel After the Funeral, Dr Penrith is a doctor, probably a psychiatrist, working at Forsdyke House in Bury St. Edmunds. Poirot sends Mr Entwhistle to Forsdyke House to call on Penrith to ask for details of Gregory Banks who had been treated there and had recently been discharged. This suggests that either Penrith treated Gregory or he is the director of the institution.