Here is the more detailed information for the Amazon free samples of 'Seven Pillars of Wisdom' that have line drawn maps as images. I think the images from the second one are good examples of some of the points I want to discuss in this thread.
The free Kindle sample for 'Seven Pillars of Wisdom: A Beautifully ...' is at:
http://www.amazon.com/Seven-Pillars-...dp/B00CONFDTY/
I now think its map image is a color scan oddly split into 2 images, left and right. None of the line drawings are in the free sample portion.
The free Kindle sample for 'Seven Pillars of Wisdom [Illustrated with ...' is at:
http://www.amazon.com/Seven-Pillars-...dp/B004XMQ6J0/
Three of the maps and none of the line drawings are in the free sample. This is the edition that I think the images were lifted from the PG Aus site.