Each cylinder has an openness and ambiguity that enables it to carry the memory of tree, forest, column, temple and burial pole simultaneously. This openness suggests continuity between the natural and cultural forms. A cultural awareness of its own place, forming a link between the constructed and the natural worlds.
Your observations about contained space and the references to Phillip Rawson, reminded me of a line or two - I think from Puck in A Midsummer Nights Dream' 'to be bounded by a nutshell yet count yourself a creature of infinite space". It's a nice concept that sits there in the minds eye.