He was officially M.T. Vasudevan Nair, but peers close to him and friends of the same or older generation called him Vasu; others generally used his initials “MT”. He chose the last for me when, in the 1980s, I wrote to him from Delhi to ask how I should address him. “MT”, he replied, would be fine. You did not so much write to, or meet with, MT as commune with him, if he let you. You did not even need to meet to keep the connect continuous and going. As far back as I can remember, this has been so.