Sas,
My memories are faded, but I think there were a people held for a lot longer than 13 days. Not sure, but the two pilots (one an Aussie, the other a Hungarian American and mate of yours) were held just south of Warri for what seemed like a long time. It was rumoured the Aussie never recovered from his mistreatment and had a breakdown, Never flew again.
In contrast I was sent with the Delta State Military Administrator and some British negotiators in a 212 (another one had his hangers on) to a village near the coast south of Warri to collect a TOPCON company man who'd been kidnapped. When the time came for him to walk toward us (like a Checkpoint Charlie scene from one of those Cold War films), he didn't want to come ! Apparently the villagers had catered to his every whim, and I mean EVERY whim and he was geting paid so he wanted to stay until his usual change over date.
NEO