John Buchan 
The Thirty-nine Steps [EPUB ebook] 

I returned from the City about three o’clock on that May afternoon pretty well disgusted with life. I had been three months in the Old Country, and was fed up with it. If anyone had told me a year ago that I would have been feeling like that I should have laughed at him; but there was the fact. The weather made me liverish, the talk of the ordinary Englishman made me sick. I couldn’t get enough exercise, and the amusements of London seemed as flat as soda-water that has been standing in the sun. ‘Richard Hannay, ‘ I kept telling myself, ‘you have got into the wrong ditch, my friend, and you had better climb out.’