Now I began sorely to repent that I had dug my cave so large as to bring a door through again, which door, as I said, came out beyond where my fortification joined to the rock: upon maturely considering this, therefore, I resolved to draw me a second fortification, in the same manner of a semi-circle, at a distance from my wall, just where I had planted a double row of trees about twelve years before, of which I made mention: these trees having been planted so thick before, they wanted but few piles to be driven between them, that they might be thicker and stronger, and my wall would be soon finished: so that I had now a double wall; and my outer wall was thickened with pieces of timber, old cables, and every thing I could think of, to make it strong; having in it seven little holes, about as big as I might put my arm out at. In the inside of this, I thickened my wall to about ten feet thick, with continually bringing earth out of my cave, and laying it at the foot of the wall, and walking upon it; and through the seven holes I contrived to plant the muskets, of which I took notice that I had got seven on shore out of the ship; these I planted like my cannon, and fitted them into frames, that held them like a carriage, so that I could fire all the seven guns in two minutes' time: this wall I was many a weary month in finishing, and yet never thought myself safe till it was done.
When this was done, I stuck all the ground without my wall, for a great length every way, as full with stakes, or sticks, of the osier-like wood, which I found so apt to grow, as they could well stand; insomuch, that I believe I might set in near twenty thousand of them, leaving a pretty large space between them and my wall, that I might have room to see an enemy, and they might have no shelter from the young trees, if they attempted to approach my outer wall.
Thus, in two years' time, I had a thick grove; and in five or six years' time I had a wood before my dwelling, growing so monstrous thick and strong, that it was indeed perfectly impassable; and no men, of what kind soever, would ever imagine that there was any thing beyond it, much less a habitation. As for the way which I proposed to myself to go in and out (for I left no avenue,) it was by setting two ladders, one to a part of the rock which was low, and then broke in, and left room to place another ladder upon that; so when the two ladders were taken down, no man living could come down to me without doing himself mischief; and if they had come down, they were still on the outside of my outer wall.