Girls, NA, TA Kasyanov. 1907 Valentin Serov (1865-1911)

The picture has something of this: people, engraving, portrait, two, man, vintage, leader, antique, wear, administration, etching, veil, retro.
Perhaps it’s a pencil drawing of two young girls sitting at a table with a book in front of them, one of them has a bow on her head.