Between 1907 and 1916, Sinn Féin, one of the nationalist organisations of the time, issued propaganda labels symbolising Irish nationhood. Their use as stamps was forbidden by Post Office regulations. The first design was a Celtic Cross, similar to one later adopted for two definitive stamps of 1923, and the second depicts a female figure and harp in an oval frame. In 1912, labels inscribed "Imperial Union" appeared, with a design of a larger harp and female figure. These labels, expressing unionist sentiments, are believed to have been printed in Manchester as a counter to the Sinn Féin labels. After the Home Rule Bill for Ireland was passed in parliament, an Irish Republican body issued labels in 1916 with the portraits of three nationalist heroes known as "The Manchester Martyrs" against an Irish tricolour background. Forgeries of these labels are common. Following the Easter Rising of 1916, American sympathisers printed eight "ERIE PUIST" labels showing portraits of seven prominent leaders and a "harp and shamrock" label. The misspelling ERIE for ÉIRE could have been because of hasty preparation.