While digging through old folders and filing cabinets, Western Canada High School teacher Geneviève Dale happened across an 81-year-old letter mailed by a Canadian Navy sailor during the Second World War. The letter was signed by Cecil Richard Moss, who attended Western Canada High, according to Dale, and addressed to Rosalie Cummings, a former schoolmate. Dale found the letter in the school's underground storage area. She was searching for old, missing yearbooks for a digitization project with some colleagues. "There's a lot of weird little nooks and crannies here at Western. And so at one point, there was a discussion...