antiquarian binding boards books browning close-up cloth corners covers culture discoloration discolouration edge edging editions hardcover historic leaves lexicon libraries library old pages print printing text value wordbook words background clear colors colours cool cooling edges flow flowing ground light moving peaceful rippling rock rocks rocky running small-waterfall steady stones stream streaming surface surfaces water waterfall wet balconies balcony building cascading creepers cutting gardener gardening height high highrise ladder man plants pruning safety safety-harness secure Singapore trimming vertical-gardening vertical-gardens wall-garden worker cliff danger face glacier ice norway abstract art border frame grunge paper texture