Sotheby's is prepping for a children's books and illustrations auction in July, and at the top of the list is what one expert calls "probably the most famous map in English literature." That, per the BBC, would be EH Shepard's original ink sketch of the Hundred Acre Wood from AA Milne's Winnie-the-Pooh, published in 1926. The map—which shows the fictional woodland, as well as depictions of Pooh, Christopher Robin, Eeyore, and Piglet—is expected to fetch up to $200,000. "It's such a valuable piece because it's such an obvious entry into the world of Winnie-the-Pooh," Sotheby's Philip Errington, a senior specialist at the auction house, tells Reuters. Four other Shepard illustrations, which haven't been viewed by the public in nearly a half-century, will also be up for grabs. (More Winnie the Pooh stories.)