Brutal, rare, and utterly of its era — this real-photo postcard shows the killing floor of Chicago's Union Stock Yards just after the "knockout," cattle felled and awaiting processing in a grim tableau that Upton Sinclair made infamous in The Jungle just three years before this card was mailed. Published by the Suhling Company of Chicago and posted on December 4, 1909, the black-and-white photograph captures the industrial reality of American meatpacking with unsentimental clarity: the heavy bodies of downed steers, the wooden pen infrastructure, the hoisting ropes and slotted chutes. The card was mailed to a young woman named Marcella in Chetek, Wisconsin — R.F.D. #2, Box 117 — perhaps as a novelty or a record of a visit to one of the most-toured industrial sites in America (the stockyards attracted over a million visitors annually). The 1-cent Franklin stamp, a flat-plate green, is cleanly tied with a Chicago machine cancel.