"In describing a town in Morocco, Tétouan: "The whiteness and pearliness of the town simply defies you-you can't get it pure and brilliant enough and the shadows drive one silly-you race after them , pause one frenzied moment to decide on a blue mauve yellow or green shadow-when up and over the wall and away and the wretched things gone for that day at least and you are gazing at a glaring blank wall and wondering why on earth you ever started to sketch it.""