Trigger.—­Where a trigger has to release a strong spring, an arrangement on the principle of a figure of 4 trap is, I believe, the most delicate; the standard may be a branch or the stock of a tree; and the other pieces should be hardened by fire.

Pitfalls.—­Very small pitfalls, with sharpened stakes, planted inside them, that have been baked hard by the fire and well poisoned, are easily to be set, but they are very dangerous to man and beast.  In preparing a pitfall for animals of prey, it is usual to ascertain whether they are deep enough, by putting in a large dog; if he cannot get out, it is very unlikely that any wild beast can. (See “Trous de loup,” p. 312.)

Pitfalls are often dug in great numbers, near frequented watering-places, to which numerous intersecting paths lead:  by stopping up particular paths, the pitfalls can be brought separately into use; therefore, those pitfalls need never be employed in which animals have been freshly killed, and where the smell of blood would scare the game.  It is difficult to prevent the covers of pitfalls becoming hollow:  the only way is to build the roofs in somewhat of an arch, so as to allow for subsidence.  If a herd of animals be driven over pitfalls, some are sure to be pushed in, as the crush makes it impossible for the beasts, however wary, to pick their way.

Uganda Thorn-wreath.—­Captain Grant found a very ingenious contrivance in use in Uganda, in Africa.  Two small Stout hoops of equal diameter, made of wood fully an inch in thickness, were lashed one above the other; long acacia thorns were interposed, forming the spokes of a wheel of which the hoops formed the rim.  The bases of the thorns were nipped between the hoops; and their points radiated towards the centre.  A great many thorns were used, so that the appearance was that of a wheel without a nave, whose spokes were so close together that they touched each other, and, as thorns taper from base to point, the spokes touched one another along their whole length, from circumference to centre.  This apparatus is always made with great neatness.  It is laid over a hole 18 inches deep, dug in the beast’s path, and the noose of a cord, of which the other end is secured to a log, is laid closely within the upper hoop.  When the beast treads on the apparatus, he crashes through the thorns, but, on withdrawing his foot from the hole, the wreath clings to his fetlock like a ruff, and prevents the noose from slipping off.  Thus there is time for the noose to become firmly jammed during the struggles of the beast.  Of course, the trapper artfully bushes the path, so as to induce him to step full upon the trap.  He sets a great many of them, and they require no looking after.  The diameter of the hoops is made proportionate to the size of the beast for which they are intended.  Six inches interior diameter was the size used for buffalo and hartebeest.

Traps.—­Steel traps should never be tied fast, or the captured animal may struggle loose, or even gnaw off his leg.  It is best to cut small bushes, and merely to secure the traps to their cut ends.  Steel traps are of but little use to a traveller.