It is extremely difficult to eradicate erroneous popular beliefs. Among such should be numbered the tendency hastily to attribute prehistoric hill-forts either to the Stone Age or to the Romans, most of such forts having in all probability been reared by the people of the Early Iron Age. The rapid progress of British prehistoric archaeology during the last two decades has shown this clearly, but it has also shown that the popular belief in the existence of neolithic camps is justified, though not in the specific instances that were expected.