I’ve posted some images of kerbstones from the NW quadrant not previously posted. The references are (1) to the K numbering system used by the excavator George Eogan to number the kerbstones consecutively clockwise starting from the break in the NE (11 is at the E entrance and 74 at the W entrance) and (2) the quadrant (NW, NE, etc) numbering system used by Martin Brennan.
I’ve also posted some images of inside the smaller tombs taken in 1993 shortly after Knowth opened to the public and they had a more relaxed attitude to what you could see. These smaller tombs are not now open to the public.