The earliest known fortification of the town was possibly the ‘werke’, probably a bulwark, which was referred to in 1497, together with a ‘sea-gate’. The first major fortification was The Blockhouse, erected in 1559 on the cliff top between Ship St and Black Lion St. It was a circular fort 50 feet in diameter with flint walls 18 feet high and about 7 feet thick; it was financed out of both town and government funds. Inside were arched recesses for storing ammunition with a dungeon below, while a battery of four large cannons from the Tower of London stood on the cliff in front; ten small guns were also provided by the town. A turret on the top housed the town clock.
In 1558, The Blockhouse, a circular fort, was built near the southern end of Middle St. It was 50 feet in diameter, 16 feet in height, with 8 feet thick walls, and had six large guns and 10 small cannons. A wall nearly 16 feet high, with placements for guns, extended 400 feet eastwards to East St and westward to West St. Its four gates were East Gate, Porters Gate, Middle Gate and West Gate. It was maintained from the ‘quarter-share; claimed by the church-wardens from each fishing trip and also by the landsmen’s rates, in accordance with the Book of Ancient Customs. In 1749, residents were able to go to the Blockhouse where ‘Mary Saunders, Widow, sells fine genuine French Brandy, at nine shillings per gallon’. The fort’s foundations were gradually undermined by erosion and it was badly damaged by the great storms of 1703 and 1705. Its clock was taken down in 1726, the walls were partly washed away by another storm in January 1749 and, by 1761, the blockhouse was completely ruined. It was eventually dismantled for an improvement to the cliff-top road in 1775.
The Blockhouse was replaced by The Battery. Built by the Board of Ordnance in 1760 at the bottom of East St, it was equipped with 12 old and dangerous guns; during a salute to Princess Amelia in August 1782, a gunner had both hands blown off, and when the Prince of Wales visited the town for the first time in September 1783 another gunner was killed. Not surprisingly, the guns were not used again. The battery was severely damaged during a storm on August 7 1786 and collapsed completely on November 3 1786. Part of the battery wall was later used in the foundations of Markwell’s Hotel. Two other batteries were built: the East Cliff Battery, built in 1793 on the cliff top opposite Camelford St, was equipped with four 36-pounders, while the West Battery, built in the same year on the cliff top at Artillery Place, was equipped with eight 36-pounders. The West Battery guns were used in royal salutes, which often caused nearby windows to shatter. Only once were its guns fired in anger: a British ship, in pursuit of smugglers and therefore not displaying her colours, fired shots which landed near battery. The gunners retaliated and the ship was forced to break out her colours. The West Battery was removed January 27 1858 for the widening of King’s Road, but Artillery St and Cannon Place were named after it. The East Cliff Battery was dismantled in about 1803, as vibration from the guns and encroachment by the sea had made the walls dangerous.