Henry Ince (1736–1808) was a sergeant-major (and later lieutenant) in the British Army who achieved fame as the author of a plan to tunnel through the North Face of the Rock of Gibraltar in 1782, during the Great Siege of Gibraltar. As a result of his work, by the end of the 18th century Gibraltar had almost 4,000 feet (1,200 m) of tunnels in which dozens of cannons were mounted overlooking the isthmus linking the peninsula to Spain. He was one of the first members of the Soldier Artificer Company, a predecessor to today's Royal Engineers, and rose to be the Company's senior non-commissioned officer. He was also a founder of Methodism in Gibraltar through his activities as a Methodist lay preacher. Ince spent most of his life in the Army and served for 36 years in Gibraltar before retiring to Devon four years before he died at the age of 72.
Born in Penzance in Cornwall in 1736, Ince first worked as a nailor (a nail-maker) before turning his hand to mining. He enlisted in the 2nd (The Queen's Royal) Regiment of Foot in 1755 and served in Galway, Ireland. The Regiment remained in Ireland until June 1765, when it was posted to the Isle of Man. It was subsequently sent to Gibraltar in March 1768, where Ince was able to put his mining skills to use.
He was also a highly active Methodist lay preacher, and may have met John Wesley during the latter's preaching in Ireland between 1756–65. Although no record of such a meeting has survived, Wesley's journal records that he often preached to soldiers in Irish towns where Ince's regiment happened to be stationed at the time. On 3 April 1769 Ince wrote to Wesley from Gibraltar in terms which suggest that the two men did know each other:
At our first coming to this place, I found a people of such abominable practices, as I never before had seen. However, I and two or three more took a room to meet in, and we were soon joined by some of the Royal Scotch: but this continued only a short time; the reason was, they would not allow your hymns to be sung, neither your works to be read. Upon this I was obliged to declare, that while I could get any of your writings to make use of, I would use them; since I had found them agreeable to the word of God. And as God gave me a word to speak, I cared not who heard, so He might be glorified. On this many were offended, and separated from us.