Hi Steve, Looking in LaVan Martineau's book "The Rocks Begin to Speak", chart 8 on page 160 gives me some ideas. The nearest match of the "Key" is the glyph whose meaning is "gone", but the circle is solidly pecked. A more likely possiblity is "in front" which is an empty circle ["holding"] with a diameter line. But if you extend this line outside the circle, it would be like your "key" and could point the direction to the grave you mentioned or some other object/site. Two such lines may point to the multiple graves. Just some ideas. You may already considered these and rejected them.
Thanks Jim. All of the glyphs lay flat on stone. The long line trails off the edge. Some Navajo think this means: “Eternity” or “Life Continues”. I have read “The Rocks Begin to Speak” and have found similarities of this sign. Notice too there are two holes inside the circle near the main line. I have set sticks in these at different sites to see if there was some significance as far as “Shadow” signs go but found nothing so far. This photo is one with only one hole in the long line. I’ll send more photos of different designs.
Thanks, Steve PS, yes, go ahead and post the photos.