into the rock; and then, turning to the right again, worked quite out, and made me a door to come out on the outside of my pale or fortification.

This gave me not only egress and regress, as it was a back way to my tent and to my storehouse, but gave me room to store my goods.

And now I began to apply myself to make such necessary things as I found I most wanted, particularly a chair and a table; for without these I was not able to enjoy the few comforts I had in the world; I could not write or eat, or do several things, with so much pleasure without a table: so I went to work. And here I must needs observe, that as reason is the substance and origin of the mathematics, so by stating and squaring everything by reason, and by making the most rational judgment of things, every man may be, in time, master of every mechanic art.