Drop on you both; a south-west blow on you
And blister you all o'er.
Stephano and Trinculo, vulgar products of civilisation, could never have said that. Moreover, Shakespeare's Caliban, like Browning's, has the poetry of the earth-man in him. When Ariel plays, Trinculo and Stephano think it must be the devil, and Trinculo is afraid: but Caliban loves and enjoys the music for itself:
Be not afear'd; the isle is full of noises,
Sounds and sweet airs, that give delight and hurt not.
Sometimes a thousand twangling instruments
Will hum about mine ears, and sometimes voices
That, if I then had waked after long sleep.
Will make me sleep again.