Holmes asks Dr Mortimer for more details
and the doctor suggests that Sir Charles’s death was
the result of some supernatural evil. The local people
themselves have seen a spectral hound roaming the moors.
Dr Mortimer is mainly concerned about the fate of Sir
Henry, Sir Charles’s second brother’s son, who is arriving
at Waterloo that day. Sir Henry is said to be the last of
the Baskerville family because Roger, Sir Charles’s third
brother, is presumed dead in Central America. Holmes
promises to consider the matter and asks Dr Mortimer to
pick up Henry at the station. Holmes decides they must
examine all explanations, not only the supernatural one