Sentence:  Beyond that misty gray of the rain , he saw the stretching hutment , low diminutive log cabins , chinked with mud , with doorways a man would have to crouch to get through , with roofs of tenting laid over boughs or boards from <WSD>hardtack</WSD> boxes , or fence rails , with cranky chimneys of sticks and dried mud . 
Meaning of the word marked with <WSD> tags:  very hard unsalted biscuit or bread; a former ship's staple