Yay, great stuff June!
One of the best things about this site, if not the best thing, is that it can inspire people to go and see stuff, which is after all what the orange book was about (at least in part).
The chambers were removed from a destroyed long barrow in 1806, so they shine an interesting little light on to the skeletal remains of other chambered tombs. Were the Cork tombs originally in barrows? Presumably, but we've had plenty of discussions on here about chambers not being covered over.