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A Better Mousetrap · Part 4 of 30

A clay box with a door, nearly 4,000 years ago

Act I: The problem ·

Listen · 3 min

Card for part 4 of A Better Mousetrap: Flinders Petrie's 1891 drawing of a pottery box with air holes, found at Lahun in Egypt.
Drawing: W. M. Flinders Petrie, Illahun, Kahun and Gurob (1891), Pl. V

Part 3 ended with a cat: mouse control that worked on its own schedule, not yours. People wanted something they could set and leave. An early candidate turned up in an Egyptian rubbish heap.

A town full of rats

In 1889 and 1890 the archaeologist Flinders Petrie dug out a town in Egypt that he called Kahun, now usually called Lahun. Its streets and mud-brick houses were laid out in the 12th dynasty, nearly 4,000 years ago.

The rats had been there too. “Rats were as great a plague in the XIIth dynasty as they are at present in Egypt,” Petrie wrote in his 1891 report. “Nearly every room has its corners tunnelled by the rats; and the holes are stuffed up with stones and rubbish to keep them back.”

A schematic plan of four mud-brick rooms seen from above. Rat holes open in the corners of three of the rooms and rats look out of them. Then the rats go back in and the holes are stuffed with stones and rubbish.

So the people of Lahun did what people still do. They blocked the holes.

The box

In a rubbish heap north of the town, Petrie’s team found something else: a pottery box, “pierced with air holes, and fitted with a sliding door.” It had been partly broken while it was still in use. A handle was missing from the top, and one hole had been stopped up with plaster in a repair. Petrie had it drawn for plate V of his report.

A long pottery box drawn at an angle, after Petrie’s 1891 drawing. Three upright air holes are cut along its side and more along its top. At one end is an arched opening where a sliding door fitted. A dotted arc on top marks the handle that was broken off.

Trap or coop?

A box, a door, something inside. It’s tempting to call it a mousetrap. Petrie didn’t. “It was not intended merely for a trap,” he wrote, “as the number of air holes show: it must have been for retaining animals alive.” He called it a coop. His guess was that it held eggs in a hatching oven, so the chicks couldn’t stray when they hatched and could be carried off without getting cold.

Not everyone has followed him. The Petrie Museum in London, which holds much of what he found at Lahun, counts “what may be a rat-trap” among the town’s finds, as evidence of a rodent problem. Nobody at Lahun wrote down what the box was for, so the question stays open.

Either way, the idea in it is the one that lasted: get the animal into a box, alive, and shut the door behind it. The weak point is the door. Every time it shuts, somebody has to open it again.

Next, part 5: the Greeks fear it, the Romans name it.

Sources

  1. Petrie, W. M. F. (1891). Illahun, Kahun and Gurob, 1889–90. London: David Nutt. Ch. II (rats) and Ch. III and Pl. V fig. 8 (the coop). Public domain. archive.org/details/cu31924086199514
  2. UCL Petrie Museum of Egyptian Archaeology. One Day in Lahun. ucl.ac.uk/museums-collections/petrie-museum/highlights/one-day-lahun