Kuyper wrote this letter of condolence (see 1916.09) to Mrs. B. Kater-Pauws, the widow of Klaas Kater (†October 26, 1916). Kater was a working-class man once employed at W. Hovy’s brewery (see 1915.02). He served as the chairman of the Dutch Workingmen’s Union “Patrimonium” from its founding in 1877 until 1900. Kater was a pioneer in Christian social and cultural action; he worked tirelessly for more than forty years to benefit workers through activism and journalism. Kuyper and Kater were friends and co-workers for more than forty years.