Lacking any biographical evidence, the reader has no way of knowing which statements may be true and which false.

Limited though the biographical evidence is, it is by no means as sparse as legend suggests.

He had compared the book to dozens of writing samples, considering their diction, syntax, punctuation, source materials, "internal biographical evidence" and "points of anxiety."

There was "internal biographical evidence," too.

If he had new biographical evidence to support this claim, he did not divulge it.

It is no coincidence that our next piece of biographical evidence, like that for 826, is poetic, the work of Walahfrid himself.

But McColley proposed a much later date of 1627 or 1628, based on internal and biographical evidence.

The only other available piece of biographical evidence is a dedicatory inscription, said to have been found at Aquinum in the nineteenth century, with the following text:

The piece is undated, but scholars usually assign a date around 1893 on the basis of musical and biographical evidence.

The only biographical evidence for his closing years is his signature as a witness to sindry deeds in the "Register of Aberdeen" in 1392.