The Idiot By Fyodor Dostoevsky"It undoubtedly has already!" observed Gania.
Varia had risen from her place and had started to go upstairs to her mother; but at this observation of Gania's she turned and gazed at him attentively.
"Who could have told her?"
Author's text looks like the fragment in bold doesn't exist at all. And I can't understand neither the grammar of this fragment nor what it means. Explain it to me please.