Researcher and writer Bill Lennox will travel from New Zealand to Darwin later this month to launch the book After Andrew , about his grandfather Andrew Lennox , who in 1899 walked to the South Alligator River from Oodnadatta , South Australia , where he set up the Northern Territory Native Industrial Mission at Kapalga. In 2008 , Bill Lennox, following in his grandfather's footsteps, went to Kapalga and was taken about by the owners .