| 41. | Hill forts may have become important as centres of trade.
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| 42. | Hill forts typically date from the Bronze and Iron Ages.
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| 43. | Burledge hill fort is a univallate Iron Age hill fort.
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| 44. | Burledge hill fort is a univallate Iron Age hill fort.
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| 45. | In the 9th century, the hill fort was intensely populated.
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| 46. | The hill fort is oval and 2.9 hectares in area.
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| 47. | Several hill forts are dotted around the Clee Hills.
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| 48. | Huge numbers of small duns, hill forts and Shetland.
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| 49. | There are around 40 known hill forts in Ireland.
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| 50. | Norway has about 400 hill forts, Denmark has 26.
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