▁artifact s . ▁Test s ▁revealed ▁that ▁carbon ized ▁objects ▁had ▁been ▁carbon ized ▁by ▁the ▁heat ▁of ▁the ▁mag ma . ▁Sig urd sson ▁dub bed ▁the ▁find ▁the ▁" P om pe ii ▁of ▁the ▁East ", ▁and ▁media ▁reports ▁referred ▁to ▁the ▁" L ost ▁Kingdom ▁of ▁Tamb ora ". ▁Sig urd sson ▁intended ▁to ▁return ▁to ▁Tamb ora ▁in ▁ 2 0 0 7 ▁to ▁search ▁for ▁the ▁rest ▁of ▁the ▁villages , ▁and ▁hopefully ▁to ▁find ▁a ▁palace . ▁Many ▁villages ▁in ▁the ▁area ▁had ▁converted ▁to ▁Islam ▁in ▁the ▁ 1 7 th ▁century , ▁but ▁the ▁structures ▁un cover ed ▁so ▁far ▁do ▁not ▁show ▁Islam ic ▁influence . ▁ ▁Based ▁on ▁the ▁artifact s ▁found , ▁such ▁as ▁bron zew are ▁and ▁fin ely ▁decor ated ▁ch ina ▁possibly ▁of ▁Vietnam ese ▁or ▁Camb od ian ▁origin , ▁the ▁team ▁concluded ▁that ▁the ▁people ▁were ▁well - off ▁trad ers . ▁The ▁S umb awa ▁people ▁were ▁known ▁in ▁the ▁East ▁Ind ies ▁for ▁their ▁horses , ▁h oney , ▁sa pp an ▁wood ▁( for ▁producing ▁red ▁d ye ), ▁and ▁sand al wood ▁( for ▁inc ense ▁and ▁medic ations ). ▁The ▁area ▁was ▁thought ▁to ▁be ▁highly ▁product ive ▁agricult ur ally . ▁ ▁The ▁language ▁of ▁the ▁Tamb ora ▁people ▁was ▁lost ▁with ▁the ▁er u ption . ▁L ingu ists ▁have ▁exam ined ▁rem nant ▁lex ical ▁material , ▁such ▁as ▁records ▁by ▁Z ol ling er ▁and ▁R aff