In 1785, Joseph Belton (an American inventor) and William Jover (an English gunmaker) sold 560 repeating flintlock rifles to the British East India Company. The guns were a very remarkable design which used a detachable magazine tube of 7 rounds stacked in series with a seven sequential touch holes. When the first round was fired, the flintlock ignited a piece of "portfire" slow match that would burn for about one minute. Pulling the trigger would move the portfire rearward one touch hole at a time, firing each in sequence as long as it remained burning. In this way, Belton advertised the gun as being able to fire 21 rounds in a single minute (using three preloaded magazine tubes). If the portfire burned out, it could be replaced and the flintlock reprimed and recocked. This was a truly impressive technological feat in 1785!