And they have another way of killing their enemies who do them harm. In a bamboo tube they put some insects similar to small house flies which have hard skins. They call this barang…And when they receive any serious insult from a person whom they wanted to kill they got one of these insects from the bamboo tube and, tied with their own hair, it is sent to the victim. As soon as it reaches the person it makes its way into the body [of the intended victim] and is induced [by magic] into the entrails. The stomach of the victim swells immensely at high tide, and at low tide it becomes small.
Povedano manuscript of 1578