 UNDETERMINED SOURCE (ANALYSIS OF HISTORICAL RECORDS INDICATES THAT IT WAS APPLIED TO THE CHARTS SOMETIME BETWEEN 1984 AND 1991).-- SUBM RUINS NOW CHARTED AROUND A CENTRAL POSITION OF: 40-41-48.25 N, 074-02-59.60 W (NAD 83). UPDATED 2/23/2006 JCM.