From the British Library, dated 3 February 1806. A ( probably apocryphal) tale of cheek rewarded!
The picture shows the postboy dressed in Swift’s dressing gown seated in Swift’s chair, as Swift bows to him. The text below the picture says:
A Gentleman employed a Post Boy to carry a present of a Turbot to Dean Swift, who seldom gave the bringer any thing for his Trouble, the Boy knowing this delivered it in an awkward & careless manner which discomposed the Doctor, who thereupon determined to teach him good Manners: “sit down in my Chair” said he “and suppose yourself to be the Dean and I will represent you” – on which the Dean delivered the Turbot and Message with great Politeness, – “well done” said the Boy “you are a very civil Fellow, here is five shillings for you and pray give my Compliments to your Master” – the Dean took the Hint, smil’d at the Joke, and rewarded him with half a Guinea.