Adversative conjunctions, p. 32, ftn.
"A Complete Grammar of Esperanto" by Ivy Kellerman Reed
Violence and captivity, methinks, are intimated in that adverse conjunction.
"Quentin Durward" by Sir Walter Scott
But the conjunction is often omitted in copulative and adversative clauses, as in Sec.
"An English Grammar" by W. M. Baskervill and J. W. Sewell