This page contains the walkthrough for Scavenger Hunt: Grandmaster Ursine Gear, a side quest in The Witcher 3: Blood and Wine.
You can pick up this side quest from the grandmaster smith Lafargue, who you'll meet him at the start of side quest Master Master Master Master!. Completing this quest allows you to craft and use the grandmaster level of the school of the bear (ursine gear).
After picking up the quest, the first location for the diagrams is north-east of Flovive (southwest of Ardaiso Quarry, and south-east of Cockatrice Inn).
At the back of the ruined building, use your witcher senses to find some rubble that can be cleared with Aard sign. Head down the underground tunnel, and just to your right you'll find a chest with half of the diagrams in the set.
The second half of the diagram set can be found in a cave northwest of Flovive, southeast of Cockatrice Inn and south of Dun Tynne Castle.
Once in the cave, head left to find a wall you can break with Aard sign. There will be note you can find here which will give you a clue as to what happened to the previous witcher and that he made some markings on the cave.
Head deeper into the cave, while following the markings, and when the path branches left and right, take the left path, and you'll find the remaining diagram plans there.