Wherethrough

There was also a small window, wherethrough a prisoner might conceivably escape.

They perceived her to be capable of diverse passions, and agitated by many languishing and painfull motions, wherethrough she fell into wearinesse and griefe[…].

1874, Ernest Myers (transl.), The Extant Odes of Pindar, translated into English, Olympian Ode V, page 16. […] the river Oanis, and the lake of his native land, and the sacred channels wherethrough doth Hipparis give water to the people, […]