"The first recorded mushroom trip in Britain took place in London’s Green Park on October 3, 1799"

 From Public Domain Review:

Fungi, Folklore, and Fairyland

From fairy-rings to Lewis Carroll's Alice, mushrooms have long been entwined with the supernatural in art and literature. What might this say about past knowledge of hallucinogenic fungi? Mike Jay looks at early reports of mushroom-induced trips and how one species in particular became established as a stock motif of Victorian fairyland.
Published
October 7, 2020

The first recorded mushroom trip in Britain took place in London’s Green Park on October 3, 1799. Like many such experiences before and since, it was accidental. A man identified in the subsequent medical report as “J. S.” was in the habit of gathering small field mushrooms from the park on autumn mornings and cooking them up into a breakfast broth for his wife and young family. But this particular morning, an hour after they had finished it, everything began to turn very strange. J. S. noticed black spots and odd flashes of colour interrupting his vision; he became disorientated and had difficulty in standing and moving around. His family were complaining of stomach cramps and cold, numb extremities. The notion of poisonous toadstools leapt to his mind, and he staggered out into the streets to seek help, but within a hundred yards he had forgotten where he was going, or why, and was found wandering in a confused state.

By chance a physician named Everard Brande was passing through this part of town, and he was summoned to treat J. S. and his family. The scene he witnessed was so unusual that he wrote it up at length and published it in The Medical and Physical Journal a few months later.¹ The family’s symptoms were rising and falling in giddy waves, their pupils dilated, their pulses fluttering, and their breathing laboured, periodically returning to normal before accelerating into another crisis. All were fixated on the fear that they were dying except for the youngest, the eight-year-old son named as “Edward S.”, whose symptoms were the strangest of all. He had eaten a large portion of the mushrooms and was “attacked with fits of immoderate laughter” which his parents’ threats could not subdue. He seemed to have been transported into another world, from which he would only return under duress to speak nonsense: “when roused and interrogated as to it, he answered indifferently, yes or no, as he did to every other question, evidently without any relation to what was asked”....

....MUCH MORE

Possibly related:

"Her Royal Highness?... Magic mushrooms at Buckingham Palace"