With me, travelling is frankly a vice. The temptation to indulge in it is one which I find almost as hard to resist as the temptation to read promiscuously, omnivorously and without purpose. From time to time, it is true, I make a desperate resolution to mend my ways. I sketch out programmes of useful, serious reading; I try to turn my rambling voyages into systematic tours through the history of art and civilization. But without much success. After a little I relapse into my old bad ways. Deplorable weakness! I try to comfort myself with the hope that even my vices may be of some profit to me.