Gibraltar, ever since its capture by the English in 1704, had been a source of much jealousy and uneasiness to Spain, and her desire to restore it to her dominions was manifested in the frequent attempts she made with that view. Invariably she was repelled by the indomitable bravery of the garrison; but a slave to her purpose, she did not desist from her efforts, and in the absence of any real occasion for disagreement with England, scrupled not to create one, in order that she might attack, and if possible, regain the fortress. A favourable opportunity for the purpose at length arrived. Soon after the convention of Saratoga in 1777, the Americans entered into an alliance with France, which was the cause of a rupture between the latter nation and Great Britain. Hostilities had been carried on for six months, when Spain insinuated herself into the dispute under pacific pretensions. Her proposals, however, were of such a nature as rendered it impossible for the British Government to accept them without lessening the national honour; and being rejected, the refusal was made the pretext for war. It was accordingly declared by Spain on the 16th June, and her eager attention was at once turned to Gibraltar. On the 21st of the same month she took the first step of a hostile nature, by closing the communication between Spain and the fortress. At this time the garrison consisted of an army of 5,382 officers and men under General Eliott. Lieut.-General Boyd was second in command. Of this force the engineers and artificers amounted to the following numbers under Colonel Green:— Officers 8 Sergeants 6 Drummers 2 Rank and File 106[11] —— Total 122 No particular demonstration on the part of the Spaniards immediately followed the closing of the communication; but General Eliott, anticipating an early attack upon the Rock, made arrangements to meet it. All was activity and preparation within the fortress; and the engineers with the artificers were constantly occupied in strengthening the defences. For better accomplishing this paramount service, the company was divided into three portions on the 23rd August, and directed to instruct the line workmen in the duties required of them. To prevent misunderstanding with regard to the _line_ non-commissioned officers—who might under certain circumstances become litigious—the Chief Engineer issued orders to the effect, that all such soldiers coming into the king’s works, were to take directions from the non-commissioned officers of the company in the execution of their professional duty.[12] ----- Footnote 11: The company wanted two privates to complete. Footnote 12: