The flower pictured on pg. 117 in Cribb's 2nd edition paph book may or may not be as labeled. We did find a very few plants without spots on the pouch of those P. godefroyae paphiopedilums from the Gulf of Siam near Koh Ang Thong, but there were no more than 3 or 4 specimens. The painting on pg. 115 is very typical of P. godefroyae from the Gulf, especially those found circa Koh Ang Thong.
Pg. 116 of his 2nd edition book shows a typical P. leucochilum from the Indian Ocean side of Thailand.
Phil Cribb never saw either of these species in situ, he only studied dead, brown, dried out, insect-eaten and fungi-damaged specimens. I spent time in both locations and I examined live plants in flower. While he doesn't seem to be able to tell the difference, I can.
In addition, while taxonomists (and myself, earlier) believed P. godefroyae is a result of past hybridization with P. niveum, we never saw any evidence of that white-flowered species anywhere within the Gulf of Siam, or from the surrounding land areas. P. godefroyae, to me, is a species with several variable yet distinct genetic traits quite different from P. leucochilum (which has its own distinct and variable characteristics).
The Ang Thong Archipelago is a group of hundreds of islands (some quite tiny) and the named island is the hiding place for ancient pirates who preyed on merchants ships which offered trade with Bangkok. The name is a convenient marker location for sailors as well as land-based merchants, thus it is easily assumed that traders could easily call plants by the name of a well-know site.
I disagreed with Dr. Fowlie at the time when he changed his mind and accepted the name "ang thong" and I still do.