 Upadhyaya to Brindavan for a private audience with India's highest female yogini Sri Anandamayi Ma, from whom he felt a "genuine sublime holiness" and received one of the most significant blessings in his life.In Patna, Bihar, Hills, along with Dr Raynor Johnson, were the only Europeans to attend the 1961 Science & Spirituality Conference, where seeds were sown for Hills' decade of cooperation with hundreds of Indian scientists and yogis, many of whom eventually journeyed to visit Hills' centers in the West and who comprised many of the delegates for a 1970 Yoga conference Hills staged in New Delhi.In 1963, the Sri Aurobindo Ashram and Gandhi Peace Foundation sponsored another conference in Patna, hosted by Dr. Rajendra Prasad, Mahatma Gandhi's longtime right-hand disciple and first President of India.