 Working his way on a speaking tour through Europe in the direction of India, Hills decided to make a precarious expedition to the remote Himalayan Hunza Valley where he had long been curious about the diet and extraordinary longevity of the Pashtun, Balti and Uzbek hill tribes.In Pakistan, Hills was the guest of Professors Duranni and Walid Uddin at Peshawar's College of Engineering.Visiting Sufi holy men and Islamic scholars in Karachi, he met Zulfikar Ali Bhutto to discuss possible Indo-Pakistan cooperation in algae cultivation in the climatically suitable Gujrat-Sind border region, which is where Bhutto and his ancestors were from.