There's the spectre of Hamlet, then that of Banquo, the shadows of Richard III.

Italy has only one spectre, Caesar, and then where did he appear to Brutus?
At Philippi, in Macedonia and in Thessaly, the Denmark of Greece, the Scotland of the Orient; where the fog made Ovid so melancholy he named the odes he wrote there Tristia.

Why did Virgil make the ghost of Anchises appear to Eneas?
Because he came from Mantua.
Do you know Mantua?
A marsh, a frog-pond, a regular manufactory of rheumatism, an atmosphere of vapors, and consequently a nest of phantoms." "Go on, I'm listening to you." "Have you seen the Rhine ?" "Yes." "Germany, isn't it ?" "Yes." "Still another country of fairies, water sprites, sylphs, and consequently phantoms ('for whoso does the greater see, can see the less'), and all that on account of the fog.

But where the devil can the ghosts hide in Italy and Spain?
Not the least bit of mist.

And, therefore, were I in Spain or Italy I should never attempt to-morrow's adventure." "But all that doesn't explain why you refuse my company," insisted Sir John.
"Wait a moment.