deb grasped the armrests of the rocking chair as words from the article seemed to leap out : ... end of whyalla concert ... allegedly gagged the guitarist ... top of abandoned mineshaft ... witnesses heard loud voices ... begging ... screaming ... cockles interviewed by police but cleared ... mineshaft searched but no body found ... oscar officially listed as disappeared ... possible suicide ... band continues touring for sake of fans ... * * * * * in its heyday , slate , copper and wheat were shifted to chittingford dales from surrounding districts by draught horse and then shunted along a narrow railway on steam engines to the port at whyalla for the long trip around the coast to the state capital , adelaide .