The court system is well documented in numerous individual case files, both with regard to jurisdiction over natives and "Europeans".

The household and treasury system is essentially documented in the records of the governor's main treasury.

The administration can mainly be traced in the files of the district offices of Herbertshöhe, Rabaul, Friedrich Wilhelmshafen and Käwieng, whereby "administration" at that time also included jurisdiction over natives.

Only a few documents from the imperial stations have survived.