This somewhat risque photo almost certainly came from Pathe's chief photographer of the time, William E. Thomas, who took a number of rather racy (but artistic) pictures of the youthful Carole (http://carole-and-co.livejournal.com/236603.html, http://carole-and-co.livejournal.com/324525.html). Lombard looks to be topless here (note that part of her left breast is visible), and smoking a cigarette to boot -- just be careful where you flick your ashes, dear.
Next, we move forward to the December 1933 issue of the Argentine film magazine Cinegraf:
Quite a few freckles are seen in this portrait, probably taken by a Paramount staff photographer.
Now on to the late 1930s or early '40s, and they may have been taken at the Encino ranch...
Carole's feeding some birds (were these the doves from her romance with Clark Gable?), and since Alfred Hitchcock is apparently nowhere in sight, she's safe.
Next, out of the cage and in a summer dress, Lombard walks among trees, with a sweater tied around her in case things get a bit chilly.
Many thanks to Tally Haugen for providing these images.