James Guidney,
Some Particulars of the Life and Adventures of James Guidney - third edition
(1862)
“ It can be approached only by a narrow passage between the mountain and the sea, across which the Spaniards have drawn a line and fortified it, to prevent the garrison from having any communication with the country. It was taken from the Spaniards by the English in 1704, and has remained in their possession ever since. The number and strength of the military works, and the vast galleries opened in the rock, excite general admiration; and the fortress is considered by most engineers absolutely impregnable. ”
