This bird of dawning singeth all night long:
And then, they say, no spirit dares stir abroad;
The nights are wholesome; then no planets strike,
No fairy takes, nor witch hath power to charm,
So hallow'd and so gracious is the time."[414:B]
"————————— Fare thee well at once!"
exclaims the apparition on retiring from the presence of his son,
"The glow-worm shows the matins to be near,
And 'gins to pale his uneffectual fire."[414:C]
This idea of spirits flying the approach of morning, appears from the hymn of Prudentius, quoted by Bourne, to have been entertained by the Christian world as early as the commencement of the fourth century[415:A]; but a passage still more closely allied to the lines in Shakspeare, has been adduced by Mr. Douce, from a hymn composed by Saint Ambrose, and formerly used in the Salisbury service.—"It so much resembles," he observes, "Horatio's speech, that one might almost suppose Shakspeare had seen them:—