When you were in Battery Prat shell room on the right you would have seen a circle in the concrete wall. That circle was where the powder would have been passed from the powder room to the shell room. The powder room door would have been closed to keep anything from getting into the powder room and detonate the racks powder. You will also notice the hole is larger then a 6" powder bag. It was also the escape path incase the door was blocked from the outside. Outside you will notice the roof is the thickest above the magazine spaces. The area inside the structure was called the "galleries"..
When you were in Battery Prat shell room on the right you would have seen a circle in the concrete wall. That circle was where the powder would have been passed from the powder room to the shell room. The powder room door would have been closed to keep anything from getting into the powder room and detonate the racks powder. You will also notice the hole is larger then a 6" powder bag. It was also the escape path incase the door was blocked from the outside.
Outside you will notice the roof is the thickest above the magazine spaces. The area inside the structure was called the "galleries"..
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