These are the extras for the world SarahLynnMarie used for The Ultimate Challenge. You can read about The Ultimate Challenge here: http://www.bay12games.com/forum/index.php?topic=42896.0 The extras include:

1) Worldgen parameters,
2) The world's history,
3) The world's sites and populations, and,
4) A map of the world.

These were generated using a vanilla version of 40d. The worldgen parameters have been verified to generate the "correct" world on 40d only. Using them in 40d16 (and, presumably, the other 40d# versions) generates a slightly different world.