I H Glendinning 1981 Hammers of Invicta History of Martello Towers Romney Marsh

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The Hammers of Invicta
Being a History of The Martello Towers Round Romney Marsh

by

I H Glendinning

Trade PB. 8vo. Published by I.H. Glendinning, Hythe, Kent, UK. 1981. 68 pgs.   

Wrappers lightly worn with some light shelf-wear to the extremities present. Previous owner's name present to the reverse of the front wrapper. Text is clean and free of marks. Binding tight and solid.

FROM WIKIPEDIA:

Martello towers, sometimes known simply as Martellos, are small defensive forts that were built across the British Empire during the 19th century, from the time of the French Revolutionary Wars onwards. Most were coastal forts.

They stand up to 40 feet (12 m) high (with two floors) and typically had a garrison of one officer and 15–25 men. Their round structure and thick walls of solid masonry made them resistant to cannon fire, while their height made them an ideal platform for a single heavy artillery piece, mounted on the flat roof and able to traverse, and hence fire, over a complete 360° circle. A few towers had moats or other batteries and works attached for extra defence.

The Martello towers were used during the first half of the 19th century, but became obsolete with the introduction of powerful rifled artillery. Many have survived to the present day, often preserved as historic monuments.