From 1935 on he turned his attention to the newly excavated archeological sites of Mohenjo-Daro and Harappa: he was particularly keen on deciphering the inscriptions of the so-called Indus Valley civilization. He wrote numerous articles on the topic,  summing up finally his research in what will remain his master piece: Studies in Proto-Indo-Mediterranean Culture (1953) in which he proposed a solution to the mysterious script of Mohenjo-Daro, and established cultural links between the Indus Valley Civilization, the Sumerian-Egyptian civilization and the ancient Mediterranean cultures.
Starting in 1935, this individual dedicated his efforts to exploring newly discovered archeological sites of Mohenjo-Daro and Harappa. He was particularly interested in deciphering the inscriptions from the Indus Valley civilization.  He published numerous articles on the subject, culminating in his major work "Studies in Proto-Indo-Mediterranean Culture" (1953), where he proposed a solution to the script of Mohenjo-Daro and established connections between the Indus Valley Civilization, Sumerian-Egyptian civilization, and ancient Mediterranean cultures.