While documentation of historic private rites are scarce , as they were passed on by oral tradition , royal cremation ceremonies have been documented since the Ayutthaya period .
While documentation of historic private rites have continued into the current Rattanakosin Kingdom .
While documentation of historic private rites are scarce , as they were passed on by oral tradition , royal cremation ceremonies have been documented since the Ayutthaya period , and have continued into the current Rattanakosin Kingdom .