 Complete the following phrase:  The society publishes the members magazine Die Harfe The Harp three times per year. All aspects of Irish philately are treated in more than 200 pages annually. The first 30 volumes are also available digitally, on DVD or USB flash drive. In particular, the magazine deals with Irish postal history. It encompasses, among others, old postal routes, the transport of mail on board overseas steamboats, national and international postal fees, and the Maltese Cross postmarks used in Ireland. Documentation of the postal history of the 