"...they vanished in the night like ghosts, none can say whither."
—Lord of Samarcand
whith·er (wĭth′ər, hwĭth′-) Archaic
To what place, result, or condition: Whither are we wandering?
1. To which specified place or position
2. To whatever place, result, or condition
[Middle English, from Old English hwider; see kwo- in the Appendix of Indo-European roots.]