"No; that will hardly be necessary. Let them consist of two beams with planks laid crosswise. They need not be more than four feet wide, and the planks can therefore be easily pulled up as the garrison falls back. I have told the tenants that during the winter, when there is but little for their men to do, they can keep them employed on this work, and that I will pay regular wages to them and for the carts used in bringing in the stones."