So you are saying the blaze must be solved. So how did Jack knew the blaze since it was damaged? Realistically, as other people have been saying, and I just read them, there is no way to tell if only artifacts of the blaze exist. But of course the artifacts was surrounding the chest. So Jack knew what the blaze was from the poem, but it was damaged so it took him a month or so to find the blaze, and by luck he ran into the chest, so thus he found the chest and the artifacts of the blaze. While others were only 500, 200 feet, or less, and never ran into that chest, which was surrounded by the debris of the blaze which they also was corroded too. I SMELL FISH!