I've a pain in my head

'I've a pain in my head'
Said the suffering Beckford;
To her Doctor so dread.
'Oh! what shall I take for't?'

Said this Doctor so dread
Whose name it was Newnham.
'For this pain in your head
Ah! What can you do Ma'am?'

Said Miss Beckford, 'Suppose
If you think there's no risk,
I take a good Dose
Of calomel brisk.'--

'What a praise worthy Notion.'
Replied Mr. Newnham.
'You shall have such a potion
And so will I too Ma'am.'

This is a humorous poem in which the doctor doesn't know what to do about Miss Beckford's headache and in turn gives himself a headache.

Calomel was a purgative potion, now used as insecticide!