Is this another hidden page? I might add it on the list of Hidden Pages I posted.
I'm not sure it's really a hidden page as such, it's just the standard XML sitemap.
2 and 3 being among the first boards that are missing and part of the historic beginning of bitcointalk forum, I am really curious in knowing what the names of the boards could have been before the got removed.
There are various boards which are not accessible to standard members, such as the Staff Board and the VIP/Donator Board. Just because some board numbers aren't visible, doesn't necessarily mean the board was removed.