| 41. | They were constructed about the central part of the community with four main gates and three postern gates.
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| 42. | Today, the secret passage's postern is closed off, but the path is still there.
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| 43. | The codename for the main operations to take Lae was "'Operation Postern " '.
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| 44. | In addition, posterns ( side gates ) were provided, for example at Gray's Close.
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| 45. | A small postern ( auxiliary ) gate was located immediately north of the second tower on the eastern side.
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| 46. | There remains a postern, some ramparts, and Our Lady of the Castle which was built in 1148.
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| 47. | In 1829, the bridge was rebuilt, and the Postern and a short section of wall were demolished.
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| 48. | Frequently, small, hidden sally ports or posterns enabled direct combat with an enemy in the moat area.
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| 49. | The three parts of the complex ( east, west and south ) all had posterns with battery artillery.
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| 50. | Additionally there were pedestrian-only gates such as Tower Gate and the postern gate at the Tower of London.
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