Keywords: Great Chain and Mortars.jpg en wikipedia 2012 January 6 Hudson River Chain and Mortars 2004-12-04 From Harper's Encyclopedia of United States History Harper Brothers 1905 Transferred from http //en wikipedia org en wikipedia by SreeBot Nonenmac at en wikipedia other versions PD-old PD-old-100 Original upload log page en wikipedia Great_Chain_and_Mortars jpg Upload date User Bytes Dimensions Comment 2004-12-04 15 18 UTC Nonenmac 551377 bytes 1148×664 <small><nowiki>Hudson River Chain and Mortars</nowiki></small> Black and white photographs |