Underwrit

[T]he Queen, perceiving all to be diſcovered, ſet down with her own Hand all the Buſineſs, and underwrit the Confeſſion with her own Hand, and gave it to the King, which having read, he flung it bravely into the Fire, adviſing her to be hereafter more faithful to him, and to his Affairs.

Source: wiktionary

The laſt Stock was underwrit by Vertue of a Charter granted Anno 1657, ſince often confirmed, and augmented, with extraordinary Powers: the Stock then underwrit was about 744000 l. of which only 372000 l. was taken in. […] for the Stock not being increaſed by New Subſcriptions proportionable to the Trade, nor by taking in the full Sum that was underwrit, but continuing the ſame 372000 l. as at firſt, upon which all Sales and Dividends were made, the Adventurers, inſtead of being increaſed from 900 as they were at firſt, to 9000, as the increaſe of the Trade required, are reduced to 550 Perſons, a leſs number than at firſt. […] but if Two Millions, or what elſe may be thought a Convenient Stock, ſhould be underwrit, then there will be no difficulty in Carrying on the Trade, without any Intermiſſion, or danger, than what may be feared by the changing of Committees now Annually made, and the increaſe of the Stock, as it will ſatisfie the Complaints that ariſe from the Contraction of the ſaid Trade, and difficulties of Admiſſion into it, ſo it will occaſion the inlarging thereof; […]

Source: wiktionary

Oft-times upon the Board / Where Helen was ingraven, you the word / Amo have underwrit, in new-ſpilt Wine: / (Good ſooth) at firſt I could not ſcan the Line, / Nor underſtand your Meaning.

Source: wiktionary

Johnſ[on]. Mr. Bayes, in my opinion, now, that Gentleman might have ſaid a little more upon this occaſion. / Bayes. No, Sir, not at all; for I underwrit his Part, on purpoſe to ſet off the reſt.

Source: wiktionary