He had gathered numerous rumors of doubtful authenticity, and now prepared them in the form of a story which promised much and told little.
This list is of very doubtful authenticity.
Ames assembled a large collection of portraits, especially those of printers, although many were of doubtful authenticity.
Although ascribed to Evagrius, these two works are considered to be of doubtful authenticity (Bamberger 1972:lxvi-lxvii).
A putative sketch of the plan, of doubtful authenticity, is exhibited in the hall.
Thus according specific status to neglecta is of doubtful authenticity.
On the whole, his reported voyage of 1516 must be ranked as of extremely doubtful authenticity.
In spite of this erroneous attribution, the "Hispana" contains very few documents of doubtful authenticity.
There are also six surviving charters, though some are of doubtful authenticity.
It is of doubtful authenticity.