Deja vu with V. Kalinin and Glazunov at Sotheby-2

[Allena]

John Preston, and you yourself know the history of existence of this picture? Do you have reason enough to be absolutely sure of its authenticity (if not documented, at least at the level of information)? I do not ask them to lead, the question is whether they exist at all?
And another question: as I understand, Kalinin, according to the auction, the authorship is not confirmed. And who, indeed, turned to him? Experts auction? The new owner?