This map shows the Virginia area patrolled by the 5th NY Cavalry during the winter of 1863-64, including the Rappahannock and Rapidan rivers.  Their camp was in Culpepper County near Stevensburg. The Battle of the Wilderness was fought near Wilderness Tavern west of Fredericksburg.
Sifton, Praed &amp; Company
This is a portion of a 1912 map created by Sifton, Praed &amp; Co.  The entire map can be found in the Library of Congress <a rel="nofollow" class="external text" href="https://www.loc.gov/item/99448878/">map</a>, and shows Virginia and Maryland.