Her Windowed Eyes, Her Chambered Heart

In this steampunk short story, Pinkerton agents Artemus West and Elspeth Sorehs have been chasing their prey across the country. When they finally catch up near the outskirts of the Cascades, though, they find he's gone to ground in a mysterious house that once belonged to his mother, a famous inventor. What secrets hidden in the house will they discover -- and how will the house protect its returned son?