Oswald Bastable is a fictional character first created by E. Nesbit. and appearing in The Story of the Treasure Seekers, The Wouldbegoods, New Treasure Seekers and Oswald Bastable.More than half a century later, Michael Moorcock. used the same name for a significantly different character who is the protagonist in The Warlord of the Air, The Land Leviathan, The Steel Tsar, and makes an appearance also in other stories.