certaynely

Of this also we haue most true experience, and most certaynely assure you that there is neyther iron or steele or the magnes stone that should so make the toombe of Mahumet to hange in the ayre, as some haue falsely imagined; neyther is there any mountayne nearer than foure myles: we remayned here three dayes to refreshe our company.

Personal Narrative of a Pilgrimage to Al-Madinah and Meccah 2003

And he would discover, certaynely, if his shipwrights did him wrong.

Songs from Books Rudyard Kipling 1900