Answer 1

1. The author was wearing a red scarf at the summit which was given to him by his great friend, Lambert. Lambert had been the leader of the 1952 Swiss Expedition to the summit, of which the author had been apart.
2. The author had worn the scarf all the way up the mountain from Darjeeling as a mark of respect and admiration for his friend.
3. In his moment of historic success, not only did the author remember his close friend, but also wished he were there.
4. By wearing the scarf, the author acknowledged Lambert‘s contribution to the journey and stated that it gave him a feeling of having his friend with him at the top.
   Thus, the scarf was a tribute to his friend.