I just got my GPS for Mother's Day and last night my husband and I went looking for our first cache and our first benchmark. We found the witness post just as described in the datasheet, the marker should have been 2 feet NW of the post. However, there was a hole in the ground where we believe the marker should have been. We don't have a metal detector to find the marker if by some chance it sank into the dirt and was covered by grass. My husband had his leatherman and he pulled out the blade and started sticking it in the ground, both in the hole and around the hole but everything he hit was a rock. This marker is supposed to be 1 inch above the ground. Is this enough evidence and searching to declare the marker gone?