Rodger Kelly's Photos 1-4
Photo Number 4 shows the remains of an Oscar. The photo was taken beside the runway at Lakunai which at the time was the main civil strip at Rabaul. I guess it would still be there but it would now be covered with volcanoc ash from the recent eruptions (the whole of Rabaul was covered with up to 10 feet of the stuff!) In retrospect, the fact that an IJAAF aircraft is there at all is strange as Rabaul was a IJN base.
The other three photos were taken at Alexishafen and are all of the same aircraft. (This looks to be the remains of a Ki-49)