Fix grammatical errors: It appears they would bury some good material they had brought with them when they traveled, and some times either forget where they buried it, or possibly found more high quality materiel in the new location, and had no need to retrieve the caches.
It appears they would bury some good material they had brought with them when they traveled, and sometimes either forget where they buried it, or possibly found more high quality materiel in the new location, and had no need to retrieve the caches.