I shall never forget as long as I live that sultry 1st of August; there seemed to be scarcely a breath of air anywhere, all the air of London had that used-up feeling which those who live in it all the year round know so well. It was hot weather, hot in the house, hot in the outside streets, hot in the burnt-up parks, hot everywhere. The sky seemed to radiate heat, and the earth seemed to embrace it; and we poor human beings who were subjected to it scarcely knew what to do with ourselves.