2 entries match your criteria. Related Historical MarkersMarkers for John Lederer's Explorations. By Craig Swain, June 23, 2007 Discovery Shenandoah Valley Marker SHOWN IN SOURCE-SPECIFIED ORDER1► Virginia (Warren County), Linden — Discovery Shenandoah Valley — John Lederer, First explorer to view this valley, saw it from this point, August 26, 1670 — — Map (db m1323) HM2► Virginia (Culpeper County), Richardsville — John Lederer and Party — . . . — — Map (db m12899) HM