Lewis Carroll was clearly a time traveller who met post modernists. Thank you, @NecessaryScene!
Reminding myself of it, aside from the name thing which stuck in my brain, actually the poem itself is possibly quite prescient - a parody of a poem by Wordsworth about his encounter with a leech-gatherer(!)
It's a first person-tale from someone off in cloud cuckoo land encountering someone who has some real hardship and has to do some actual hard work, describing his own inner monologue about his attempts to wrap his brains around the concept...
So he'd clearly also met a certain strain of academic narcissism.