The trees form an overlapping border, and render escape almost impossible.

The whole is carefully decked with short green rushes, making the pit like a concealed pitfall.

As the hedges are frequently about a mile long, and about as much apart at their extremities, a tribe making a circle three or four miles round the country adjacent to the opening, and gradually closing up, are almost sure to inclose a large body of game.

Driving it up with shouts to the narrow part of the hopo, men secreted there throw their javelins into the affrighted herds, and on the animals rush to the opening presented at the converging hedges, and into the pit, till that is full of a living mass.

Some escape by running over the others, as a Smithfield market-dog does over the sheep's backs.