I found a mention of Kiangan here: http://books.google.com.ph/books?id=WInyBgZA45sC&pg=PT203&lpg=PT203#v=onepage&q&f=false
You might want to liaise directly with those from Kiangan, here are some tour guides and their mobile numbers.
Credit:stackoverflow.com‘
5 Mar, 2024
4 Mar, 2024