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For what it's worth:
"A rare excitement ran through The New Yorker's copy department last week when it was discovered that a line of Middle English poetry quoted in a piece by Peter Hessler about standing in police lineups had a thorn in it. Usually a thorn, like a splinter, is something you want to remove, with tweezers, or maybe a sterile needle, but this thorn was something we wanted desperately to insert ...."