Don Marquis,
Looney the Mutt
(1921)
“ He had no theories about work or idleness; he accepted either as it came; he had little conscious thought about anything, except finding Slim again. And one thing worried him: Slim, who was supposed to be looking for Looney, even as Looney was looking for Slim, left no mark. He was forever looking for it, searching for the traces of Slim's knife—a name, a date, a destination, a message bidding Looney to follow or to wait—on freight-sheds and water-tanks, and known and charted telegraph poles and the tool-houses of construction gangs. ”
