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YPRES, BELGIUM - APRIL 06: Members of the Royal Canadian Mounted Police lay a wreath during the Last Post ceremony at the Menin Gate Memorial to the Missing on April 6, 2017 in Ypres, Belgium. April 9, 2017 marks the 100th anniversary of the Battle of Vimy Ridge which was a military engagement fought mainly by Canadian Corps in France during World War One. The Vimy Ridge 100 commemoration anniversary will involve events being held at the Canadian National Vimy Memorial in France and the National War Memorial in Ottawa. (Photo by Jack Taylor/Getty Images)

YPRES, BELGIUM - APRIL 06: Members of the Royal Canadian Mounted Police lay a wreath during the Last Post ceremony at the Menin Gate Memorial to the Missing on April 6, 2017 in Ypres, Belgium. April 9, 2017 marks the 100th anniversary of the Battle of Vimy Ridge which was a military engagement fought mainly by Canadian Corps in France during World War One. The Vimy Ridge 100 commemoration anniversary will involve events being held at the Canadian National Vimy Memorial in France and the National War Memorial in Ottawa. (Photo by Jack Taylor/Getty Images)
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Getty Images News Jack Taylor

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TORONTO, ON- APRIL 3 - North York resident Bob Chisholm is an experienced genealogy researcher, he put those skills to the test when he stumbled upon a pair of letters to his mother-in-law by one of her pen pals from the front just before and during the Vimy push. North York resident Bob Chisholm has has letters written to his mother-in-law from a friend (Harry A. Chalmers) who fought at Vimy Ridge. A couple of them were written during the battle and include accounts of what Chalmers saw. Chalmers ended up dying in the war and Chisholm's mother-in-law died back in 2008. For a story leading up to Vimy's centennial April 9; would be great to get photos of letters on their own and also pics of Chisholm with them. (Steve Russell/Toronto Star via Getty Images)

TORONTO, ON- APRIL 3 - North York resident Bob Chisholm is an experienced genealogy researcher, he put those skills to the test when he stumbled upon a pair of letters to his mother-in-law by one of her pen pals from the front just before and during the Vimy push. North York resident Bob Chisholm has has letters written to his mother-in-law from a friend (Harry A. Chalmers) who fought at Vimy Ridge. A couple of them were written during the battle and include accounts of what Chalmers saw. Chalmers ended up dying in the war and Chisholm's mother-in-law died back in 2008. For a story leading up to Vimy's centennial April 9; would be great to get photos of letters on their own and also pics of Chisholm with them. (Steve Russell/Toronto Star via Getty Images)
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Toronto Star Steve Russell

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Canadian Prime Minister Justin Trudeau and his wife Sophie Gregoire watch their son Xavier lay a wreath at the remembrance monument in the Canadian Military Cemetery of Beny-sur-Mer, northwestern France on April 10, 2017. Trudeau is in France with his family where he led commemorations on April 9, for the 100th anniversary of the Battle of Vimy Ridge which was part of a larger British-led offensive that included Australian soldiers, known as the Battle of Arras, which was a diversionary tactic to assist a major French attack further south. It was the first time that four military divisions from Canada fought together as the Canadian Corps. / AFP PHOTO / CHARLY TRIBALLEAU (Photo credit should read CHARLY TRIBALLEAU/AFP/Getty Images)

Canadian Prime Minister Justin Trudeau and his wife Sophie Gregoire watch their son Xavier lay a wreath at the remembrance monument in the Canadian Military Cemetery of Beny-sur-Mer, northwestern France on April 10, 2017. Trudeau is in France with his family where he led commemorations on April 9, for the 100th anniversary of the Battle of Vimy Ridge which was part of a larger British-led offensive that included Australian soldiers, known as the Battle of Arras, which was a diversionary tactic to assist a major French attack further south. It was the first time that four military divisions from Canada fought together as the Canadian Corps. / AFP PHOTO / CHARLY TRIBALLEAU (Photo credit should read CHARLY TRIBALLEAU/AFP/Getty Images)
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ARRAS, FRANCE - APRIL 09 : Boots with red poppies sit on the lawn during a commemoration ceremony at the Canadian National Vimy Memorial during a commemoration ceremony to mark the 100th anniversary of the Battle of Vimy Ridge at the Canadian National Memorial in Vimy, near Arras, northern France on April 09, 2017. (Photo by Philip Rock/Anadolu Agency/Getty Images)

ARRAS, FRANCE - APRIL 09 : Boots with red poppies sit on the lawn during a commemoration ceremony at the Canadian National Vimy Memorial during a commemoration ceremony to mark the 100th anniversary of the Battle of Vimy Ridge at the Canadian National Memorial in Vimy, near Arras, northern France on April 09, 2017. (Photo by Philip Rock/Anadolu Agency/Getty Images)
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VIMY, FRANCE - APRIL 09: The Prince of Wales, The Duke of Cambridge and Prince Harry visit the trenches and tunnels used during the battle of Vimy Ridge, as part of the 100th year anniversary of the battle on April 9, 2017 in Vimy, France. (Photo by Andy Commins - Pool/Getty Images)

VIMY, FRANCE - APRIL 09: The Prince of Wales, The Duke of Cambridge and Prince Harry visit the trenches and tunnels used during the battle of Vimy Ridge, as part of the 100th year anniversary of the battle on April 9, 2017 in Vimy, France. (Photo by Andy Commins - Pool/Getty Images)
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