31. The perimeter consisted of a fifteen-foot picket fence, linking eight blockhouses . 32. Also, trenches surround the tower and blockhouses . 33. The Crown argued that the corporation was not adequately maintaining the castle and blockhouses . 34. Its closest equivalents are the blockhouses built by Henry VIII on the River Thames. 35. The entire line of defense was dotted with pillboxes, bunkers, and blockhouses . 36. In 1884, Cervera supervised the construction of a series of blockhouses around Melilla. 37. The " Mohmand blockade " involved British armoured cars patrolling unpaved tracks between blockhouses . 38. Fort Insley was the largest of the blockhouses , measuring twenty by thirty feet. 39. The Germans built three concrete blockhouses , a subterranean hospital and a water reservoir. 40. Three log blockhouses were built, measuring sixteen by twenty-four feet each.
