whereat

conj

1. (archaic)At which, or toward which.

   “But as ſome of the Oxen in driving, miſſed their fellovvs behind and honing after them, bellovved as their nature is: Hercules chanced to heare them lovv again, and anſvver from out of the cave vvherein they had been beſtovved: vvhereat he turned back, and made haſte thither.”

   “Again she saw that bosom old, / Again she felt that bosom cold, / And drew in her breath with a hissing sound: / Whereat the Knight turn'd wildly round, / And nothing saw, but his own sweet maid / With eyes uprais'd, as one that pray'd.”

2. (archaic)Because of which; whereupon.

   “[…] we were driven a little to the Eaſt of the Molucca Iſlands, and about three Degrees Northward of the Line, as our Captain found by an Obſervation he took the 2d of May, at which time the Wind ceaſed, and it was a perfect Calm, whereat I was not a little rejoyced.”

   “"[…] In going to Mr Carlyle you have done the best thing possible; you have put your sister into the care of the shrewdest man in London." Whereat the object of this quite unexpected eulogy found himself becoming covered with modest confusion.”

   “Whereat in a moment of cross unruth He thought, “All right if you want the truth!” “I don't believe it! It isn't true! It never happened! Did it, you?” Seeing no help in wings or feet She withdrew back in self-retreat[…]”