Alexander Henry was a Scottish

Scotland

Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...

 gunsmith, based in Edinburgh

Edinburgh

Edinburgh is the capital city of Scotland, the second largest city in Scotland, and the eighth most populous in the United Kingdom. The City of Edinburgh Council governs one of Scotland's 32 local government council areas. The council area includes urban Edinburgh and a rural area...

, and designer of the Henry rifling used in the Martini-Henry

Martini-Henry

The Martini-Henry was a breech-loading single-shot lever-actuated rifle adopted by the British, combining an action worked on by Friedrich von Martini , with the rifled barrel designed by Scotsman Alexander Henry...

 rifle.

He submitted a rifle to the competition organised by the British government for a replacement to their existing Snider-Enfield

Snider-Enfield

The British .577 Snider-Enfield was a type of breech loading rifle. The firearm action was invented by the American Jacob Snider, and the Snider-Enfield was one of the most widely used of the Snider varieties. It was adopted by British Army as a conversion system for its ubiquitous Pattern 1853...

service weapon. The government did not adopt its action, but did adopt its seven-grooved rifling scheme.