The shaft was tunnelled 2.1 metres ( 7 ft ) down below the terrace .
The tomb chamber measured 30 by 16 feet ( 9 by 5 m ) ( NS by EW ) , forming a rounded rectangle .
The shaft was tunnelled 2.1 metres ( 7 ft ) down below the terrace and the tomb chamber measured 30 by 16 feet ( 9 by 5 m ) ( NS by EW ) , forming a rounded rectangle .