I marked the spot where the dead horse signal came from with a red X. Of course, you might get that kind of signal around any old ranch or farm site, ghost towns, etc. At the red circle got a gold/silver response, could be raw gold or jewelry. Orange circle a gold response, still unidentified as to whether raw gold or cache. When checking for horse treasure, the black X, first got signal for copper coins there. Both Xs have a horse response. The best thing to do is get a 2-box detector which will locate caches up to a depth of 7-8 ft, check it out.
Can't recall if I've seen your other map.