Add to this double apprehension the mystery that still hung over the behaviour of my friends,their unexplained desertion of the stockade, their inexplicable cession of the chart, or harder still to understand, the doctor's last warning to Silver, "Look out for squalls when you find it," and you will readily believe how little taste I found in my breakfast and with how uneasy a heart I set forth behind my captors on the quest for treasure.