Tintin and the broken ear

After the artistic, technical and emotional peak of 'The Blue Lotus', Herge wisely decided to take things down a gear, rather than attempt to somehow out-marvel that seminal book. So 'The Broken Ear' is Tintin in a minor key - the undeviating single narrative is shorn of sub-plots; the spaces of South America, compared to the intricate detail of Japan and China in 'Lotus', are comparitively broad.