 In October 1944 , he opened his six @-@ month archaeological field school in <unk> , where he instructed various students from across India in the methodologies of the discipline . Wheeler became very fond of his students , with one of them , B. B. Lal , later commenting that " behind the <unk> exterior , Sir Mortimer had a very kind and sympathetic heart " . Throughout his period in India , his students were some of the only individuals to whom Wheeler warmed ; more widely , he was annoyed by what he saw as the idleness , incompetence and corruption of Indian society . Initially focusing on the northwest of the subcontinent , Wheeler was particularly fascinated by the Bronze Age Indus Valley Civilization . On his initial inspection of the Indus Valley sites of Mohenjo @-@ daro and Harappa , he organised a very brief excavation which revealed fortifications around both settlements . He later led a more detailed excavation at Harappa , where he exposed further fortifications and established a <unk> for the settlement . 
