When I found the Royal Gazette announcement about the districts in 1917, it sadly did not contain the Monthon Krung Thep, at that one at that time was not under the Ministry of the Interior but the Ministry of Urban Affairs. I now was googeling to identify the district which was renamed in 1911 from Doem Bang Kao to Ban Chian (it's Hankha in Chainat) together with the creation of the district Doem Bang, and nearly the only hit was this thread at the Thai webforum vcharkarn.com. It starts with exactly that list I was missing earlier, but as usual it adds something odd as well. It seems that there were more provinces than I knew before - both Phra Nakhon and Thonburi are split in several provinces, Phra Nakhon Nuea, Phra Nakhon Klang and Phra Nakhon Tai (northern, central and southern Phra Nakhon) and Thonburi Nuea and Thonburi Tai (northern and southern Thonburi). I have never heard about those before, I always thought there were just the two province Phra Nakhon and Thonburi until they were merged into Bangkok in 1971. And there are nearly no Google hits for these province names, and almost nothing in the Royal Gazette as well. Anyone know when these 5 provinces were created, and when they were merged into the two provinces?
The thread contains a lot more histories of other districts, have to look through it much more, and maybe I will find further previously unknown facts. But first I will update the XML with these district lists, should be ready shortly after this post.