I juistjust saw it in one of Yusupov's books, he has it credited as "Cozio 1766".
His 1766 book "Il Giuoco Degli Scacchi" is actually digitized by Google books: http://books.google.it/books?id=aCcCAAAAYAAJ&printsec=frontcover&source=gbs_ge_summary_r&cad=0#v=thumbnail&q&f=false
Unfortunately, neither diagrams nor notation were invented yet. You're on your own to find out where he describes the position...