In these lines from Keats 'Ode to a Nightingale' 'The heart aches, and a drowsy numbness pains My sense as though of hemlock i had drunk Or emptied some dul...

In these lines from Keats 'Ode to a Nightingale'
'The heart aches, and a drowsy numbness pains
My sense as though of hemlock i had drunk Or emptied some dull opiate to the drains one minute past and Lethe-wards had sunk',
the poet uses

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