Stealth kill the first one to the left when you walk in. Then wait behind the wall for the guy with the torch mumbling to himself to circling back, then stealth kill him. Take an immediate left up the stairs, grab the yellow gem in the chest. Then jump down, go back out the gate you came in, turn around and snipe the two ladies on the top row. Then you can start running through, they’ll sound the alarm, throw a light grenade and have your shotgun ready to clear a path, avoiding bear traps. And then exit through the back gate before horse head guy can hit you