Location: World Seed as #666. Approx. 9477 / 75 / 12102 from origin
Retrieved maps Ocean Explorer and Woodland Explorer from Cartographer.
Once at the location, there is no mansion relative to the map. I expanded the map in game to make sure. Since the biome is roofed forest, I took two pictures the second I had the liberty of burning/TNTing the area for clarity and partial frustration. (haha)
Thanks.