Mike, The Discovery Series maps, 89 in all, cover all of Ireland and locate all of the townlands. Map # 34 covers much of Cavan, parts of Leitrim and Longford. Arvagh, in Co. Cavan, is located at 275 970 on this map but, I'm afraid, without a decent map, there will be not much value to you in all of these coordinates. In case you can't locate Arvagh itself, Cavan town is a further about-12 miles nearly NE of Arvagh. Cavan town is located at 420 050. All I can say is - good luck. Pete Schermerhorn, in the glorious Berkshire hills of western Massachusetts