No ritual were performed. Consultation were done at a temple after midnight. The deity with consult is "dee ya pek", one of the twin from underworld that control spirits.

My wife heard the singing on and off whenever she's taking shower in the washroom, that's why she's been asking me if I'm the one singing outside but that's not the case. All these while I told her it could be due to some other factor and don't be too silly to let imagination run wild. It was only when I fell sick then hear it for the first time.

Many years ago I hear in my office  strange tales happen to one of our deputy director who fond of working late into night at the library alone as she a a foreigner without family with her. One day she hear somebody typing away at the typist pool table. She get curios and went to check it out. To her shock, all those headless typing away on the type writer. She fainted at the office and fall sick for some time. Doctor diagnost her as tyroid issue as her heart beat in-regular after this incident. She did not extend her contract and went home after that.