boom cut float industry log logging mill ocean plank river saw sawmill sea timber tree trunk water wood bush-environment dangers description descriptive explaining explanation green haulage historic history lettering log-hauling logging-industry message painted shadows sign sunlight timber-industry tree-haulage West-Australia whim white circle circular cracked cracks enormous giant horse-drawn hub huge large paint peeling-paint rim round spokes timber-tools tree-felling two-wheeled West-Australian wheel wheels beams fastened metal-rim