Because of the method that the CWCG authorities used to re-inter the remains of the fallen POWs, we can intuit quite a bit of information about the 104 graves that are labelled as UNKNOWN SOLDIERs.
Three policies allow this. One, the remains were aligned in the CWCG cemeteries as they arrived for the jungle camp burial sites. Two, the CWGC kept meticulous records. Three, the remains were often segregated by nationality. We can use this information to assign a nationality[1] to these 104:
It also helps to know that there are no Australian graves at ChungKai. Although the headstones are generic, within the CWGC records is information on the nationality of the Unknown Soldier. On their website under what they call Concentration reports[2] are notations about his nationality. Combining all this data, I was able to assign a nationality to each of these graves.
Because of the way the remains were re-interred, we can also learn a bit about how they were buried.
The majority (82/104) are in individual graves labelled as Unknown. The remainder are in common graves with their compatriots.
Because of the ‘batch’ burials we can also reasonably assign a place and period that these deaths took place:
69 of these deaths took place at three locations: ChungKai or Thambaya hospitals or Kin SaiYok camp. As would be expected, 70% took place during the Speedo period or immediately thereafter.
[1] I have chosen to add a ‘/’ to the code to distinguish these graves from the ‘known’ graves.
[2] Each one takes about 10 clicks of the mouse to drill down into.