Note 34 — Chapter V · Magic Rites connected with the Several Departments of Nature
Reading edition
Tukang is the name given in Kedah to a kind of Hornbill, which is believed to be the same as the langlin of Perak. The horn is of a yellow tinge, and is made into buttons, which, the Malays say, turn to a livid colour whenever the wearer is about to fall sick, and black when he is threatened by the approach of poison.34