ated ▁from ▁the ▁L ing ay en ▁and ▁I loc os ▁coast s , ▁who ▁then ▁migr ated ▁into ▁the ▁Southern ▁Cord ill era ▁range ▁before ▁sett ling . ▁ ▁I bal oy ▁society ▁is ▁composed ▁of ▁the ▁rich ▁( b ak n ang ) ▁and ▁three ▁poor ▁classes , ▁the ▁cow hand s ▁( p ast ol ), ▁farm hand s ▁( sil bi ), ▁and ▁non - I bal oy ▁slaves ▁( b aga en ). ▁ ▁The ▁I bal oy ▁have ▁a ▁rich ▁material ▁culture , ▁most ▁not ably ▁their ▁m umm ification ▁process , ▁which ▁makes ▁use ▁of ▁salt water ▁to ▁prevent ▁organ ▁decomposition . ▁P ounded ▁gu ava ▁and ▁pat ani ▁leaves ▁are ▁applied ▁to ▁the ▁cor pse ▁to ▁prevent ▁mag got ▁or ▁w orm ▁inf est ation ▁while ▁the ▁body ▁d ries , ▁the ▁process ▁taking ▁anywhere ▁from ▁two ▁months ▁to ▁even ▁a ▁year ▁until ▁the ▁body ▁is ▁hard ened . ▁ ▁The ▁I bal oy ▁build ▁their ▁houses ▁( bal ai ▁or ▁ba eng ) ▁near ▁their ▁far ms . ▁These ▁are ▁usually ▁built ▁on ▁five ▁foot ▁posts ▁( tok od ) ▁and ▁contain ▁only ▁one ▁room ▁with ▁no ▁windows . ▁P ine ▁trees ▁are ▁usually ▁used ▁to ▁build ▁the ▁houses , ▁especially ▁for ▁wealth y ▁families , ▁while ▁b ark ▁b am bo o ▁for ▁flo ors ▁and ▁walls , ▁and ▁c og on ▁grass ▁for ▁roof s ▁( at up ), ▁are ▁used ▁by ▁the ▁poor . ▁For ▁cook ing , ▁they ▁use ▁p