There are some drawings that show s Dajaks with blowgun and parang-ilang but never see one with Dohun or daggers that is in my opinion not so old on Borneo as the sword the dajaks Used 
The daggers have Arabic moslim influence . 
 
the name Maleiers was used by the dutch people for moslim people Arabic boeginezen (that is why we see a lot off krissen from them on Borneo)   and Dayaks that became moslim that they see on Borneo in the first part off  the 16 cnt 
Maleiers where at the cost in mid 13 century not deep inside off Borneo in this time Broenei came in historie 
and second  some at Djohor te soekadama hindoe javanees people setteld on the Kapoeas (that is to explain why javanees influence swords has been found by Nieuwenhuis 
 
The Dutch Compagnie people had their first contract between The Netherlands and the Sultan off Sambas in 1609.  
 
So Sadap is in my opinnion no dayak weapon  but an borneo weapon 
 
There is an mandau form that never been on the forum I have to ask the ex owner if I may show the pics off this one 
 
Other wise I picture the drawing 
 
Ben
		 
		
		
		
		
		
		
		
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