If you've never read Delia Sherman's fiction before, then this short story - featuring a very determined ghost, steampunk automatons, and a smart heroine - is a delightful place to start. If you have read Delia Sherman's fiction, then you know that you are in for a treat.
"The Ghost of Cwmlech Manor"originally appeared in Steampunk!: An Anthology of Fantastically Rich and Strange Stories, edited by Kelly Link and Gavin J. Grant. It was reprinted on Tor.com.