-- step towards your window and turn around to notice a flash in the mirror, like a coin glint but bigger. Nancy goes to the window to investigate and sees Bridget in her room across the way (apparently in the same hotel as Nancy) doing something odd with some sort of electrical device. How bizarre!
Hint 3
When you talk to Ewan, ask him about a way to get into Bridget's room, and he'll give you ... hmm. An arrow and a zip line. Is this helpful?
Hint 4
Yes, it is, if you got the compound bow from the training area at the safe house.
Once you have both the bow and the zip line, Nancy will combine them in inventory. Go to Nancy's room and look out the window, then use the bow on the rooms across the way.
Hint 6
This will put you into archery mode again, as in the training room. Click and hold to draw the bow, then aim for the little twirling disc above the open window. Wait till the disc stops moving, then fire at its very center -- and one heart-stopping moment later, you're in Bridget's room!
Hint 7
To return to Nancy's room, click on Bridget's middle window, and Nancy will go back home again.