Murder hole
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A murder hole or meurtrière is a hole in the ceiling of a gateway or passageway in a fortification through which the defenders could shoot, throw or pour harmful substances or objects such as rocks, a
Murder holes at Bodiam Castle
Calcium oxide
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Calcium oxide, commonly known as quicklime or burnt lime, is a widely used chemical compound. It is a white, caustic, alkaline, crystalline solid at room temperature. The broadly used term lime connot
Murder hole
…a fortification through which the defenders could shoot, throw or pour harmful substances or objects such as rocks, arrows, scalding water, hot sand, quicklime, or hot oil (rarely used because of its cost), down on attackers. Similar holes, called machicolations, were often located in the curtain walls of…
Calcium oxide powder