Sentence:  A party was sent to search, and there they found all the powder ready prepared, and, moreover, a man with a lantern, one Guy Fawkes, who had undertaken to be the one to set fire to the <WSD>train</WSD> of gunpowder, hoping to escape before the explosion. 
Meaning of the word marked with <WSD> tags:  A trail or line of something, especially gunpowder. (from 15th c.)