"...they vanished in the night like ghosts, none can say whither."

—Lord of Samarcand

whith·er (wĭth′ər, hwĭth′-) Archaic

adv.

To what place, result, or condition: Whither are we wandering?

conj.

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.]