A revised and updated version of
Abraham Kuyper: An Annotated Bibliography 1857-2010 by Tjitze Kuipers (2011)
You can buy a printed edition of this book on the site of the publisher.
A letter to the editor in which Kuyper asks on what basis the Arnhemsche Courant had spread the rumor that he personally would come to support the candidacy of A.F. de Savornin Lohman in the electoral district of Arnhem. He asserts that the report is completely untrue.