Lady Boyles Last Party

On the opposite side, hop onto the guard post, then the roof behind you.

Climb to the next roof on the right and enter the open window. Defeat the weeper inside with a sleeper bolt.

Another pair of weepers will descend the stairs. Sleep bolt the one entering the room; the other stays in the stairwell.

Blink to the rooftop on the right, find stairs leading down, and defeat the final weeper.

Enter the room they guarded to find a Rune (1/3) on an Outsider Shrine and a Bone Charm (1/2) on a corpse in the next room.

Return to the start. Use your Heart to locate a Rune in the water upstream. Swim past it to the farthest point upstream, using Blink while swimming to avoid fish.

Hop out on the platform to the left, use the Heart to pinpoint a Rune (2/3), and dive to grab it.

Return to the starting area. When the tallboy is elsewhere, cross the bridge and sleep bolt the guard down the street to the right.

Hide the guard's body and enter the open doorway. Wait for a weeper to start climbing the stairs.

Ignore the four weepers at ground level. Sneak to the stairs, tail the lone weeper, and choke him out when possible.

Continue to the top and loot the room. Find Bone Charm (2/2) and other valuable items.

Option 2 (Ground Level Access): After crossing the bridge, follow the ditch parallel to the road beneath the estate walls to find a boarded-up circular opening. Smash the boards and crawl through. Present an invitation (obtained from the Art Dealer in the 'House of Pleasure' mission) or follow a reveler to pick up a dropped invitation. Hand it to the guard to enter. Inside the gate, grab the Blueprint (Spiky Grenade Housing) from the guardroom table. Continue into the courtyard and enter the door up the stairs to the left.

Option 3 (Sewer Access): From the start of the level, find the sewer entrance below the estate. Dive underwater next to the gate to find the sewer key. Unlock the grating, swim to the end, climb out, and ascend the stairs. Open the door to enter the Boyle Estate. In the main room, Blink to the wooden beams above, head to the barred window, and activate the lever. Drop down, proceed through barrels on the raised section, and go up the stairs to the left to reach the kitchen. Climb another floor and go through the door on the left to join the party.

If you missed the Blueprint (Sticky Grenade Casing) in the guardhouse before entering the mansion, you can find it in a guard room in the tunnel in the courtyard between the two main building entrances.

To complete the optional Lord Shaw mission, talk to him outside the main house and give him Pendleton's note. Duel him. Use sleep bolts for a zero-kill run.

After dealing with Lord Shaw, head back inside.