Solomon Kane strategy explosives

"Your last question is easily answered, sir," Kane replied. "I myself had the tale spread that the hermit possessed a store of gold, knowing that would draw your scum as carrion draws vultures. For days and nights I have watched the hut, and tonight, when I saw your villains coming, I warned the hermit, and together we went among the trees back of the hut. Then, when the rogues were inside, I struck flint and steel to the train I had laid, and flame ran through the trees like a red snake until it reached the powder I had placed beneath the hut floor. Then the hut and thirteen sinners went to Hell in a great roar of flame and smoke. True, one escaped, but him I had slain in the forest had not I stumbled and fallen upon a broken root, which gave him time to elude me."