Usually during excitement, one will be prompted to do something. I was not excited at the moment the idea hit me. But the opposite experience happened to me while traveling in buses or trains. I was depressed to see the unsanitary behavior of my fellow passengers and this idea about sanitary awakening has come to my mind. Then I remembered the author - A.G.GARDINER who was prompted by a mosquito in a train to write his essay - A FELLOW TRAVELLER.