Any news from Dublin? How Irish exiles in America knew about the 1916 Rising before relatives in Ireland

The ingenuity of two Kerry brothers and the groundwork done by the 1916 leaders and Clan na Gael in America was largely responsible.
British intelligence knew a rising was planned, that Roger Casement was on his way from Germany in a submarine, and that the Aud was on the high seas with weapons to be landed on the west coast.