Notes

The 18-Pounder Canon

18-pounder cannon.  In Chapter 16, Josh examined the 18-pounder cannon:

I study the 18 pounder in front of me. The barrel a fat black cast-iron tube, sitting on its wooden truck, clamped to the ship’s side by a creaking breach-tackle. No sights on its barrel yet, the traversing plate hanging loose on a line threaded through the thimble at the back of the barrel.

The quoins of a gun are the wooden sides of the carriage; the truck is the rod or axle which allows the gun to traverse an arc, up or down.

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