Jarse. The photo labelled "Bridge Over Markham R. Bulolo 1948" should probably read "Bridge Over Markham R. near Lae 1948".
Actually, that may be the building the original Markham Bridge, however the river looks too narrow (may be the camera perspective) although the terrain on the other side looks correct.
I think that insignia on the nose of the Anson is Carpenters (later became Mandated Airlines). Do you have the full registration?