Nobody but savages thinks that clothes have ghosts, but Tom Sawyer conjectures that ghosts' clothes "are made of ghost stuff".
As a rule, not very much is seen of a ghost; he is "something of a shadowy being".

Yet we very seldom hear of a ghost stark naked; that of Sergeant Davies, murdered in 1749, is one of three or four examples in civilised life.

{69b} Hence arises the old question, "How are we to account for the clothes of ghosts ?" One obvious reply is that there is no ghost at all, only a hallucination.

We do not see people naked, as a rule, in our dreams; and hallucinations, being waking dreams, conform to the same rule.

If a ghost opens a door or lifts a curtain in our sight, that, too, is only part of the illusion.