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LONDON, ENGLAND - MAY 31: A Sotheby's employee holds 'The Original Map of the Hundred Acre Wood' by E.H. Shepard, estimated at £100,000 to £150,000, at the unveiling of original Winnie-The-Pooh sketches at Sotheby's on May 31, 2018 in London, England. The map has been unseen for almost half a century and is up for sale alongside four further long hidden original Winnie-The-Pooh illustrations at Sotheby's London on 10th July 2018. (Photo by Chris J Ratcliffe/Getty Images for Sotheby's)

LONDON, ENGLAND - MAY 31:  A Sotheby's employee holds 'The Original Map of the Hundred Acre Wood' by E.H. Shepard, estimated at £100,000 to £150,000, at the unveiling of original Winnie-The-Pooh sketches at Sotheby's on May 31, 2018 in London, England.  The map has been unseen for almost half a century and is up for sale alongside four further long hidden original Winnie-The-Pooh illustrations at Sotheby's London on 10th July 2018. (Photo by Chris J Ratcliffe/Getty Images for Sotheby's)

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Sotheby's technicians handling an original signed ink drawing by E.H. Shepard of "...an enchanted place on the very top of the forest", 1928, estimate £70,000-£90,000, during the unveiling of the original map of Winnie-the-Pooh's Hundred Acre Wood by E H Shepard at Sotheby's saleroom in central London ahead of its sale by the auction house. (Photo by Yui Mok/PA Images via Getty Images)

Sotheby's technicians handling an original signed ink drawing by E.H. Shepard of "...an enchanted place on the very top of the forest", 1928, estimate £70,000-£90,000, during the unveiling of the original map of Winnie-the-Pooh's Hundred Acre Wood by E H Shepard at Sotheby's saleroom in central London ahead of its sale by the auction house. (Photo by Yui Mok/PA Images via Getty Images)

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LONDON, ENGLAND - MAY 31: A Sotheby's art handler holds 'The Original Map of the Hundred Acre Wood' by E.H. Shepard, estimated at £100,000 to £150,000, at the unveiling of original Winnie-The-Pooh sketches at Sotheby's on May 31, 2018 in London, England. The map has been unseen for almost half a century and is up for sale alongside four further long hidden original Winnie-The-Pooh illustrations at Sotheby's London on 10th July 2018. (Photo by Chris J Ratcliffe/Getty Images for Sotheby's)

LONDON, ENGLAND - MAY 31:  A Sotheby's art handler holds 'The Original Map of the Hundred Acre Wood' by E.H. Shepard, estimated at £100,000 to £150,000, at the unveiling of original Winnie-The-Pooh sketches at Sotheby's on May 31, 2018 in London, England.  The map has been unseen for almost half a century and is up for sale alongside four further long hidden original Winnie-The-Pooh illustrations at Sotheby's London on 10th July 2018.  (Photo by Chris J Ratcliffe/Getty Images for Sotheby's)

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A gallery assistant poses in front of war-time drawings by British illustrator E H Shepard at a press preview of 'EH Shepard: An Illustrator's War' at the House of Illustration in north London on October 8, 2015. The World War I illustrations of E. H. Shepard, the artist who brought Winnie-the-Pooh to life, go on display for the first time on October 9, revealing scenes of devastation that completely contrast with Pooh's idyllic surroundings. AFP PHOTO / LEON NEAL --- RESTRICTED TO EDITORIAL USE, MANDATORY MENTION OF THE ARTIST UPON PUBLICATION, TO ILLUSTRATE THE EVENT AS SPECIFIED IN THE CAPTION (Photo credit should read LEON NEAL/AFP/Getty Images)

A gallery assistant poses in front of war-time drawings by British illustrator E H Shepard at a press preview of 'EH Shepard: An Illustrator's War' at the House of Illustration in north London on October 8, 2015. The World War I illustrations of E. H. Shepard, the artist who brought Winnie-the-Pooh to life, go on display for the first time on October 9, revealing scenes of devastation that completely contrast with Pooh's idyllic surroundings. AFP PHOTO / LEON NEAL  ---  RESTRICTED TO EDITORIAL USE, MANDATORY MENTION OF THE ARTIST UPON PUBLICATION, TO ILLUSTRATE THE EVENT AS SPECIFIED IN THE CAPTION        (Photo credit should read LEON NEAL/AFP/Getty Images)

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A gallery assistant poses in front of a drawing by British illustrator E H Shepard entitled 'Gallant attempt by a member of the British Expeditionary Force to do justice to all his New Years' gifts' at a press preview of 'EH Shepard: An Illustrator's War' at the House of Illustration in north London on October 8, 2015. The World War I illustrations of E. H. Shepard, the artist who brought Winnie-the-Pooh to life, go on display for the first time on October 9, revealing scenes of devastation that completely contrast with Pooh's idyllic surroundings. AFP PHOTO / LEON NEAL --- RESTRICTED TO EDITORIAL USE, MANDATORY MENTION OF THE ARTIST UPON PUBLICATION, TO ILLUSTRATE THE EVENT AS SPECIFIED IN THE CAPTION (Photo credit should read LEON NEAL/AFP/Getty Images)

A gallery assistant poses in front of a drawing by British illustrator E H Shepard entitled 'Gallant attempt by a member of the British Expeditionary Force to do justice to all his New Years' gifts' at a press preview of 'EH Shepard: An Illustrator's War' at the House of Illustration in north London on October 8, 2015. The World War I illustrations of E. H. Shepard, the artist who brought Winnie-the-Pooh to life, go on display for the first time on October 9, revealing scenes of devastation that completely contrast with Pooh's idyllic surroundings. AFP PHOTO / LEON NEAL  ---  RESTRICTED TO EDITORIAL USE, MANDATORY MENTION OF THE ARTIST UPON PUBLICATION, TO ILLUSTRATE THE EVENT AS SPECIFIED IN THE CAPTION        (Photo credit should read LEON NEAL/AFP/Getty Images)