Ah yeah. Ok there are definate holes in my theory but maybe the Unbreakable only stated that the DE's had to hide and protect the objects and then never speak of them again (or something along those lines). Maybe LV didn't actually include in the Unbreakable anything about the DE's not retrieving the objects in case he needed them to retrieve them later. Not sure why he didn't include giving them away in the Vow though. Maybe it just didn't occur to him that they would dare. Any thoughts?