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Buried collections of Bronze Age metal items (called hoards) have been found all over Britain. For hoards discovered since the 1960s, such as the 1965 discovery of the Walderslade hoard, advancements like inexpensive metal detectors, ground-penetrating radar, and aerial surveys have made it much easier for searchers to locate hoards before putting the first shovel in the ground. Hoards found before the 1960s, however, such as the discovery of the Auchnacree hoard around 1921, were not aided by such technologies and thus were much more likely to ________