The word "therewith" is correct and usable in written English
It is an adverb that means "in addition to this; by that means." Example sentence: He was pleased with the result, and therewith he accepted the job.
Sparing and mostly unsentimental, these poems reverberate with echoes of John Donne, a 16th-century poet and writer of metaphysical love poetry: "We looked, we loved, and therewith instantly/Death became terrible to you and me .Graves writes with a jaunty lyricism, moving from sonnets to ballads.
The history of the Hellenic language, and therewith of the Hellenic people, goes back to the Mycenaean civilization of about 1400 1100 bce, which itself was the heir of the pre-Hellenic civilization of Minoan Crete.
The issue was whether there should or should not be an interval between the date at which Caesar was to resign his provincial governorships and, therewith, the command over his armies and the date at which he would enter his proposed second consulship.
Röhm's storm-trooper street thugs had provided useful muscle during the party's long years of struggle, but their continuing penchant for unruliness, Hitler feared, could invite the army's intervention and therewith his own overthrow.
He makes therewith statements about the world, its conditions of being created, its estrangement from the purpose of creation (e.g., sin), and its determined goal (eschatology, or view of the last times).
The Roman formula of combating fortune with reason and therewith ensuring unity throughout the Mediterranean world worked surprisingly well in view of the pressures for disunity that time was to multiply.
The opposite of this freedom would arise when an institution (e.g., the church) restricts the range of theological inquiry with normative claims, forcing the discipline therewith to assume ideological functions.
Suspending elections, even in the midst of war, was wrong, even if holding the election would have resulted in Lincoln's defeat and therewith the cause of the Union.
S. F. Perry, M. P., therewith invited his son to take a year off and develop his tennis game.
"A failure to comply with the terms of this letter will result in, inter alia, an application for injunctive relief, pending a court action, at which our client, Mr Denis O'Brien, will seek damages, including punitive damages and his costs associated therewith, including, without limitation, all legal and professional costs, fees, expenses, duties and outgoings".
