In stamp collecting circles, the word "forerunner" usually describes a postage stamp used during the time period before a region or territory issues stamps of its own. However, in Irish reference books, such as "Handbook of Irish Philately", the term "forerunners" usually refers to political and propaganda labels. These often resemble stamps, but few of them were used on Irish mail and they had no legal standing for mail in Ireland. Four values, 1c, 3c, 24c (deep-green), and 24c (mauve-purple) were produced in New York by the Irish veterans of the US Civil War and are known as the 1865–67 Fenian issue. The 1893 colonial design are unofficial essays and are classed as bogus.