Sitting still day after day has its advantages. I am trying to view my surroundings through the eye of a Natural Philosopher. A few days ago I was gazing at another chaland making its way up-stream about a quarter of a mile ahead of us. One of the boatmen needed to reach a lashing on the mast that was too high for him. So he gripped the rim of a large barrel that was standing upright on the deck, tipped it back towards himself, and rolled it over to where he wanted it, then climbed up onto its end. From the way he managed this huge object and from the sound that it made under his feet, I could tell that it must be empty. Nothing terribly unusual in and of itself, since empty barrels are commonly shipped from place to place. But it made me wonder whether there was any outward sign by which I could distinguish between a chaland loaded as M. LeBrun's is, and one that had a few tons of musket-balls in the bilge with empty barrels above to disguise the true nature of its cargo from spies?