We could only know the authors are eye witnesses by taking it on their say-so, that is, by believing them, or by believing a string of say-sos.

In perfect love, devoid of hateful strife, / Allide with bands of mutuall couplement.

The rise of the tide.

In forming triad systems in 15 letters, there are only four typical openings, viz: which, from the way in which the triads containing 1 are laced with those containing 2, may be called the single tetrad, triple tetrad, hexad, and duodecad types, ...