Historical ghosts play, nevertheless, a prominent part in all countries. Lilly, Baxter and Clarendon, all relate the remarkable warnings which preceded the murder of Villiers, Duke of Buckingham. In this case the warning was given not to the threatened man, but to an old and faithful friend, who had already been intimate with the duke's father. He saw the latter appear to him several nights in succession, urging him to go to the duke, and after revealing to him certain peculiar circumstances, to warn him against the plots of his enemies, who threatened his life. Parker was afraid to appear ridiculous and delayed giving the warning. But the ghost left him no peace, and at last, in order to decide him, revealed to him a secret only known to himself and his ill-fated son. The latter, when his old friend at last summoned courage to deliver the mysterious message, was at first inclined to laugh at the warning; but when Parker mentioned the father's secret, he turned pale and declared only the Evil One could have entrusted it to mortal man. Nevertheless, he took no steps to rid himself of his traitorous friend and continued his sad life as before. The father's ghost thereupon appeared once more to Parker, with deep sadness in his features and holding a knife in his hand, with which, he said, his unfortunate son would be murdered. Parker, whose own impending death had been predicted at the same time, once more waited upon the great duke, but again in vain; he was rudely sent back and requested not to trouble the favorite's peace any more by his foolish dreams. A few days afterwards Lieutenant Felton assassinated the duke with precisely such a knife as Parker had seen in his visions.