Afterwards, you must complete the Ladies of the Wood and The Whispering Hillock quests before you can return to the Bloody Baron and conclude his quest line. The Whispering Hillock will contain the second and final major decision of this quest line. While it may seem trivial at the moment, the decision of whether or not to free the Ghost of the Tree will decide how the Bloody Baron’s quest line will end.
After completing The Whispering Hillock Geralt figures out that Gran, the old lady that does the bidding of the Crones, is actually Anna Strenger, the Bloody Baron’s wife. Although the Baron is upset that you didn’t bring her back, that wasn’t exactly part of the deal and he proceeds to give you the information he promised. At this point, he will ask if you’re willing to assist him with one more thing. If you accept, the Return to Crookback Bog quest will begin, and you’ll be one step closer to completing the Bloody Baron’s quest line.