A. I. Ipat’ev, was a cousin of Nikolay and the Vavilov family historian. He remembered  his cousin’s departure:
One clear summer day in 1916 an automobile, a great rarity then, pulled up to the house. Nikolai Ivanovich came up to me while I was sitting in the garden and greeted me. He was, as always, radiant and happy, only his appearance was unusual and strange. He was wearing a cream-colored summer suit, across his shoulders was a full pack, and on his head was the strangest thing of all, a white hat with a double brim, which he called a “hello-good-bye’’ hat. He got into the auto and drove off.
- Quoted in B.M. Cohen (1991) Nikolai Ivanovich Vavilov: The explorer and plant collector, Econ. Bot. 45:38-46. [↩]