sentences:  The final 2.7 m of the chamber, near the north end, is set off as a separate compartment by two vertically set slabs, leaving a 60 cm gap in the middle.The chamber formed by these slabs had two unconnected areas of cobbled floor, one of larger slabs in the west, and one of rubble in the east.Two postholes set in front of the back wall might indicate internal supports for a ceiling.