Definition of "mought"

"I'm a plain man; rum and bacon and eggs is what I want, and that head up there for to watch ships off. What you mought call me? You mought call me captain..."

1881–1882, Robert Louis Stevenson, Treasure Island, London, Paris: Cassell & Company, published 14 November 1883

‘Mought be a little in the barn. But dont let him hyear us, er he'll find hit and po hit out.’

1931, William Faulkner, Sanctuary, Vintage, published 1993, page 46

sythe I suppose in my selfe þt yf we had mought cõuenyẽtly cum to gether ye wold rather haue chosĩ to haue hard my mynde of myn owne mouth thã by þe mean of a nother / (Modern Spelling) Since I suppose in myself that if we had mought conveniently come together you would rather have chosen to have heard my mind of mine own mouth than by the mean of another.

1529, Sir Thomas More, A dyaloge of syr Thomas More knyghte: one of the counsayll of oure souerayne lorde the kyng & chauncellour of hys duchy of Lancaster. Wherin be treatyd dyuers maters, as of the veneration & Worshyp of ymagys & reliques, prayng to sayntys, & goyng on pylgrymage. Wyth many othere thyngys touchyng the pestylent sect of Luther and Tyndale, by the tone bygone in Saxony, and by tother laboryd to be brought in to Englond

[The king Solamona] did ordain, that of the strangers that should be permitted to land, as many (at all times) mought depart as would; but as many as would stay, should have very good conditions, and means to live from the State.

1626, Francis Bacon, New Atlantis