That small anomaly is a reminder that these sites were built and modified by people working with practical constraints, not to a tidy plan drawn up in advance.

The hut measures 4.8 metres north to south and 3.5 metres east to west internally, making it a compact but not negligible space. Its walls are corbelled, meaning each course of stone projects slightly inward over the one below, gradually closing the gap toward a roof rather than relying on timber or mortar. Those walls survive to an internal height of one metre and average 1.7 metres thick, giving a sense of the effort that went into construction. A lintelled doorway on the western side, where a flat stone would have spanned the opening, was still intact enough to be described by the Delaps in 1910, but has since collapsed; at its base it measured 0.8 metres wide. On the eastern wall, traces of what may have been a window or a wall-niche are still visible, a detail that adds a little texture to what might otherwise seem a purely functional shell.