I cannot remember when it changed - did one particular hurricane make the big difference? - but twenty/twenty-five years ago there was a huge above waterline sand bar off the south-west corner of Green Cay which I think had been there for decades - along with lots of sand on the cay on that corner. It was utterly different from what it is now and has been for years. That was sand that did not "come and go" - it just went and never came back - at least in any amount close to what had been there for many many years. As to the beach across from Green Cay at Club O, I think it clear that there is a decreasing amount of sand on the Club O beach as the years roll on - with ups and downs along the way, of course.