You can go through all 3 apartments fairly easily, as side from blood flies. attention must be paid to where the guards in the main square are. It doesn’t take much for them to notice you.
The shrine on the top floor of the building to my right as I started could be accessed from the window allowing you to just go to the shrine without dealing with the blood flies. I went back and forth a couple of times to get the flammable liquor bottles that are in the building down the alley way to save on incendiary arrows.
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