User blog comment:X-Machinist-X/Dishonored random stuff/@comment-26947588-20151011222025/@comment-1500935-20151013175018

You can also enter the manor through the same way. You need to find the key near the locked door, but it's on the bottom of the canal and easy to miss without Dark Vision. I love hearing the nobles asking me if I've been "slumming up a bit" when I reach the ballroom that way. xD