From Lyons, 15½ miles east on U.S. 56, 5 miles south on 31 (Plum), then ¾ mile west on P. On the east side of the Little Arkansas and south of P are faint remains of Camp Grierson, established in 1865 to protect the river crossings and trading post during a period of Indian unrest. The camp was manned again in 1867 by a company from the 10th Cavalry black regiment and named for Captain Benjamin Grierson. Rifle pits and some burial indentations (the interred have been moved to Fort Leavenworth National Cemetery are still visible. Across the road and on the west side of the river is where the Stone Corral once stood. Today nothing remains of the 300x200-foot stone corral although it once contained a trading post and living quarters. The gate helps you know you've arrived but note that the primitive signage at Camp Grierson is not accurate.