The power of things to change and create character is well attested.
Appeal to the king was allowed and is well attested.
At any rate, the use of the dragon as an image is attested well into the 14th century.
His command of Greek is well attested in the sources.
That was a long ride, as he could well attest, having just ridden it the other way.
From this also come all those prophetic dreams many of which are well attested.
This list includes societies that are well attested by reliable sources.
This is also well attested in films of this period and just after.
John Nutt remains an obscure individual, with only his death well attested in 1716.
"Opened his mouth" was a common Semitic expression at the time, well attested in literature from the period.