A very important feature from an ethnological standpoint is the feathering of the arrow. The object of this is to steady the arrow in its flight and thereby prevent windage. The method of feathering is as follows: The quills of the wing feathers of a hornbill, or sometimes of a fish eagle, are parted down the middle. Then three, or sometimes only two, of these parted quills with their adhering vanes are placed longitudinally at equal distances along the arrow shaft so that their extremities are about 6 centimeters from the butt of the shaft and their webs stand straight out from the surface of the reed, forming equal obtuse angles to one another. These vanes are retained in this position by windings of very light, flexible rattan at their extremities. As a security against slipping or change of relative position, a coating of the above-mentioned fruit pulp, often mixed with pot black, is applied. The final preparation of the arrow consists in chopping off with a bolo or small knife the outer edges of the vanes. This is done in a slightly slanting direction within about 1 centimeter of the butt end of the vanes, at which point they are cut in a direction transverse to the length of the arrow shaft.
The feathering of the arrow is always done with precision, as the accuracy of its flight, the uniformity of its rotation, the length of its trajectory, and the consequent penetrative power are known to depend upon proper care in this respect.
Unlike other bowmen, the Manóbo makes a notch in the butt end of his arrow, but as far as my observations go, there are never any decorative incisions and tracings on Manóbo arrows.10
10Among the Mandáyas arrow shafts frequently have ornamental wavy lines and concentric circles incised along the length of the shaft, but this decoration has been observed among no other tribe that I know of in eastern Mindanáo.
There seem to be no special arrow makers. Nearly every adult Manóbo, who has not relinquished the use of the bow and arrow, with no other tool than his bolo and perhaps a small knife, can complete a bow and a bunch of arrows in a relatively short time.
In stringing the bow it is grasped by the center of the stock with the left hand and the top, where the loose loop of the bowstring is placed, is held with the right hand. The bottom of the bow rests upon the ground and is supported by the right foot. The right hand then, by a movement toward the person, bends the stock sufficiently to allow the loop of the bowstring to reach and slip into its notch, the left hand and foot retaining the bow in a bent position. The bowman then grasps the central part of the stock between the thumb and the four fingers of the left hand and seizing the feathered part of the arrow between the first and middle fingers of the right, he places the end of it at right angles to, and in contact with, the center, or thereabouts, of the string. The part of the arrow in front of the feathering rests upon the thumb and middle finger and under the index finger of the left hand. Raising up the bow and holding it inclined at an angle of about 20° from the vertical, the top being toward the right, the string, with the arrow butt always pressed against it, is drawn back sufficiently (about 30 centimeters) to give the requisite tension. The string is then allowed to fly back, while at the same time the bowman releases his hold upon the arrow butt, and thus the arrow speeds on its way. When ready to be released the end of the arrow points to the bowman's right shoulder.
The greatest range of a good arrow is about 75 meters. Its effective range, however, is only about one-third of that.
I can not laud the expertness of the Manóbo as a bowman. Here and there one meets a really good shot, but the average man can not score 50 per cent at close range.
No quivers worthy of the name are used. When a war raid is undertaken, the arrows are placed in a bamboo internode, which is carried in a horizontal position at the bowman's side. Arrows are never poisoned. The bamboo of which the spearhead is made seems to have a somewhat poisonous effect as a wound caused by it is very painful and hard to cure.