Talk about a mansion FULL of secret rooms and entrances.  I finally finished with 90%, but I could not for the life of me figure out where to find the keys to the red & blue doors that are located towards the top of the mansion.  Does anyone have any clues to offer.

This mansion is a real detective type of challenge.  I loved it.  Sensible flow, very hard, and it didn't have all that long boring backtracking.  Yes, backtracking is involved, but you don't get bored doing it.  lolololol 
Great mansion!

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This Topic was moved here from Included Mansions by Semi-Native.

The red key is a matter of using keys in the right order (in other words, visiting rooms in the right order). The blue key - it's not necessary to open both blue doors.