Early siege The Count de las Torres's first move was, by cover of night, to move five battalions and 1,000 working men forward to take the Devil's Tower and two other abandoned fortifications, and to dig trenches parallel to Gibraltar's walls. Until the invention of the Koehler Gun in the
Great Siege (1779–1783), fixed artillery guns could not be depressed below the horizontal, so the Spanish working parties could not be fired upon from the North Face of the Rock. The finished trenches might have provided the attackers with a good foothold from which to assault the town. However, 'Admiral Wager moved his squadron out of the bay to the eastern side of the isthmus, and at point-blank range, yet beyond the reach of the Spanish guns, pounded the men with enfilade fire for three days, inflicting on them perhaps more than 1,000 casualties.' The Spaniards soon built batteries to drive away Wager's ships, but even without naval bombardment the strong winds and heavy rain of February made digging and maintaining the trenches nearly impossible. Willis's battery, on the North Face of the Rock, gave the Spaniards a great deal of trouble. After a natural cave was discovered in the Rock, a plan was hatched to mine under Willis's Battery and 'excavate a gallery 1.5 metres wide and 1.7 high to a depth of about 25 metres, then a further 20 upwards, and to fill the cavity with 400 barrels of powder.'
First heavy bombardment Failing to create a strong stepping stone for a land assault, and lacking the means for an assault from the sea, de las Torres's only option now was to pound the British into surrender. On 24 March (NS) The Spaniards did great damage to the northern part of the town, the affluent
Villa Vieja, and 'a hundred houses were by that means laid in rubbish.' After the siege the ruins were removed to create present-day Casemates. Despite the structural damage there were few casualties. The greater concern was the number of men the British had available to man the guns, repair the damage to the fortifications, and serve on sentry duty. This proved to be a major problem for the garrison. The Spanish bombardment continued for ten days. In his entry for 24 March (O.S.) 'S.H.' noted: 'last three Days very heavy rains and some Wind.' The terrible weather caused great problems for the besiegers in the trenches beneath the rock, and the Spanish had to ease their bombardment. A Spanish official journal published in
Madrid in 1727 highlights the problems the besiegers were suffering and their frustrations:
Reinforcements arrive During this relative lull in the Spanish bombardment, much needed reinforcements arrived in Gibraltar. On 7 April (N.S.) the 25th (Middleton's, or the
King's Own Scottish Borderers) and 34th (Haye's, or the
Border Regiment – later the
Royal Border Regiment) Regiments arrived with a 480-strong detachment from
Menorca. Then on 1 May (NS) the Governor, the Earl of Portmore, arrived with ten companies of the
First Guards and the 14th Regiment (Clayton's, or the
West Yorkshire Regiment – later the
Duke of Wellington's Regiment). Camp Bay derives its name from this siege, when a regiment was encamped above it. 1727 also saw the destruction of the trees which grew on the Rock: One of the few sorties of the siege occurred just before the arrival of Lord Portmore. An ingenious plan devised by Clayton, it failed due to the gunners acting too soon:
Second heavy bombardment By 7 May (N.S.) de las Torres was ready to launch another heavy bombardment. This caused major damage to the town and batteries, and caused far more British casualties than any earlier point in the siege. S.H. recorded in his journal: The damage done to the fortifications in one day could be immense: The recently arrived British reinforcements, however, allowed the garrison to maintain the batteries, re-mount the guns, and return fire. Lord Portmore, in an attempt to boost the morale and productivity of his infantry turned labourers, increased their pay from eight pence to a shilling a day. On 15 May (N.S.), de las Torres, trying to make a point, sent: Nevertheless, the firing from the Spanish guns began to slacken. After several days' continuous fire the Spanish iron cannon began to burst, whilst the better brass cannon began to drop at the muzzle from overheating. The besiegers were also beginning to suffer from a lack of supplies owing to the poor
Andalusian roads. 'Another deserter confirms their being in a miserable state of Health, with great want of Water and Provisions.' The garrison, on the other hand, had ample supplies of provisions, guns, and powder from the sea, and soon began to outgun the Spaniards. The Spanish continued to fire upon Gibraltar, but 'S.H.' wrote: 'We laugh at them for Fools to throw away their Powder Ball and Shells, since they neither fright, kill or hurt us.' ==End of hostilities==