50a- 'Jap guns on railroad cars near Tanepeg base.' [two soldiers work on a piece of artillery]
50b- 'Magicienne Bay area.' [soldiers drive military truck on a road by the coast]
50c- 'Death Valley. Many Jap tanks can be seen disabled.' [landscape photo, likely Makin Island]
50d- 'Jap gun mounts on railroad cars near Tanepeg base.' [artillery lined up between bushes]