Ṭāhir al-Balkhi maintained that the way to correct any excess or loss in the range of the arrow was by bringing the lower siyah in toward his side in the case of excess, and by raising the bow with his wrist in the case of loss; or, by raising the bow with his wrist and projecting the lower siyah away from his side if the loss persisted, without resorting to the device of raising the left hand in the case of loss in the range of the arrow or dropping it in the case of excess therein. Instead, he would hold the last knuckle of the thumb of his left hand on a level with his left shoulder when he stretched out his left arm for aiming, and would correct any error therein by bringing the lower siyah in toward his side to an extent which would rectify the error and bring the arrow closer to the target in the case of excess, and by pushing out the bow with his wrist in the case of loss. If the arrow still fell short of the target, he would push the bow out with his wrist and projec...