I AM NOT IN THE SAME LEAGUE AS YOU GUYS AS FAR AS KNOWLEGE OF THESE THINGS.
BUT IT SEEMS TO ME A GOOD PALCE TO LOOK FOR FURTHER INFORMATION MIGHT BE ANTHROPOLIGICAL STUDIES. DUE TO THE STUDIES DONE ON THE POLYNESIANS THEY HAVE TRACKED THEIR MOVEMENTS FROM PLACE TO PLACE AND THRU TIME. IF STUDIES HAVE BEEN DONE IN YOUR AREA OF THE WORLD IT MIGHT BE POSSIBLE TO TRACK SEVERAL WAVES OF MIGRATION TO AND FROM PLACES AND PERHAPS THRU LUCK AND ARTEFACTS PIECE TOGETHER A POSSIBLE ORIGIN FOR KAMPILIAN TYPE WEAPONS AS WELL AS OTHERS. YOU WOULD ONLY HAVE TO LOOK AS FAR BACK IN TIME AS TO WHEN IRON AND THE TECKNOLOGY TO WORK IT AS WELL AS WHEN TRADERS FROM MORE ADVANCED SOCIETYS CAME INTO THE AREA.
CHOPPER TYPE BLADES WERE AROUND VERY EARLY IN CHINA AND INDIA AND THEY WERE SEA FARING TRADERS. THEY MAY HAVE ESTABLISHED TRADE IN BORNEO AND THE PHILIPPINES BEFORE ANY OTHERS OR ONE OF THE WAVES OF IMIGRATION MAY HAVE BROUGHT THE FORM IN.
AS TO WHY ONE TRIBE MIGHT BE IGNORED OR LEFT OUT OF A REFRENCE WORK,
1.TIME AND MONEY IS GENERALLY VERY LIMITED.
2. IF YOU ARE SEEN AS A FRIEND OF AN ENEMY TRIBE YOU WILL NOT BE WELCOME.
3. PERHAPS ANOTHER TRIP TO COVER WHAT WAS MISSED THE FIRST TIME WAS PLANNED BUT FOR LIFE'S MANY REASONS WAS NEVER DONE.
4. YOU RELY ON REFRENCES WHICH MAY BE IN ANOTHER LANGUAGE AND INTERPRET TRIBAL NAMES WRONG, OR THE ORIGINAL AUTHOR OF THE REFRENCE MISUNDERSTOOD WHAT HE WAS TOLD AND GOT IT WRONG.
MISTAKES ARE MADE, THINGS ARE OMITTED IN ALL REFRENCES.
WE JUST HAVE TO DO THE BEST WE CAN WITH THE REFRENCES THAT ARE AVAILABLE AND IN A LANGUAGE WE CAN READ
