from Period Piece, chapter IV, Education (Gwen Raverat)

School upset me very much at first, and I did not think that I could survive it, when the poison gas of homesickness settled down over my head, with its indescribably nausea. Though it was not really home-sickness, for I did not want to go home, only to escape into an air which I could breathe. I remember the first morning, kneeling at prayers (an alarming rite to me), and staring out of the window, when my eyes ought to have been tight shut, and thinking: 'If only I could get out into that garden, perhaps I might feel better; anyhow there are some quite ordinary trees there, and some real grass' - for everything inside the house seemed to be tainted with a nightmare horror.