The first Seven Summits list as postulated by Bass (the Bass or Kosciusko list) chose the highest mountain of mainland Australia, Mount Kosciuszko (), to represent the Australian continent's highest summit. Reinhold Messner postulated another list (the Messner or Carstensz list), replacing Mount Kosciuszko with Indonesia's Puncak Jaya, or Carstensz Pyramid (). Neither the Bass nor the Messner list includes Mont Blanc. From a mountaineering point of view, the Messner list is the more challenging one. Climbing Carstensz Pyramid has the character of an expedition, whereas the ascent of Kosciuszko is an easy hike. Indeed, Patrick Morrow used this argument to defend his choice to adhere to the Messner list, Being a climber first and a collector second, I felt strongly that Carstensz Pyramid, the highest mountain in Australasia ... was a true mountaineer's objective.