desires to remove plate 10 from its buried position the user pulls cord portion 64 thereby exerting a retrieval force on cord 60 when a retrieval force is exerted along cord portion 64 in the direction of arrow 2 as shown in fig3 b tensioning member 70 will move to exert retrieval force upon plate 10 at or about second aperture 30 closer to perimeter 12 exerting a retrieval force upon plate 10 nearer the perimeter causes plate 10 to pivot so that pulling plate 10 upward experiences less resistance because the perimeter 12 leads the way and moves through the bury material 90 as illustrated in fig2 b tensioning member 70 could comprise a knot or enlargement as described above as shown in fig2 c the present invention could comprise two tensioning members 70 so long as a knot or other enlargement along cord 60 is larger than first aperture 20 and or second aperture 30 such a knot or enlargement can equally function as tensioning member 70 as shown in fig2 a 2 b and 2 c tensioning member 70 serves as means for selectively providing an anchoring force at the first aperture 20 and also for selectively providing a retrieval force at the second aperture 30 the illustrated embodiments of fig2 a 2 b and 2 c have a common structural and functional feature namely that cord 60 can be separated from plate 10.