Samuel Butler, Erewhon — Chapter 1: Waste Lands (1872)
“ It is surprising how soon the eye becomes accustomed to missing twenty sheep out of two or three hundred. I had a telescope and a dog, and would take bread and meat and tobacco with me. Starting with early dawn, it would be night before I could complete my round; for the mountain over which I had to go was very high. In winter it was covered with snow, and the sheep needed no watching from above. If I were to see sheep dung or tracks going down on to the other side of the mountain (where there was a valley with a stream—a mere cul de sac) , I was to follow them, and look out for sheep ”
