This collection consists of letters of the Duff family from 1914 to 1918. It includes letters from Louis Duff, who enlisted in Moose Jaw in 1914, and his brother Cecil, who enlisted in Winnipeg in March 1916. As well there are letters between Louis and Cecil’s mother Rosa and her sister Lily (Aunt Lily in the correspondence from the brothers), correspondence from Harry Richey, the uncle of Louis and Cecil, and correspondence from Dr. Thomas Leask, related to the Duff family by marriage. The collection consists of thirty-four letters.