Indian government spends $1.3 Million to buy letters which may show national hero Gandhi was gay.
- Letters between Mahatma Gandhi and Hermann Kallenbach are said to shed light on their 'loving relationship'
- They are among archive of documents which cover Gandhi's time in South Africa, his return to India and his contentious relationship with his family
- Papers were due to have been auctioned at Sotheby's in London this week
