That it was from Olga Platanova he made no doubt.

But why she should interest herself so persistently in his welfare was quite beyond him, knowing as he did that in no sense had he appealed to her susceptibility.

And what, after all, could she mean by "great danger"?
"Save yourself!" He sat for a long time considering the situation.

At last he struck the window sill a resounding thwack with his fist and announced his decision to the silent, disinterested wall opposite.
"I'll take her advice.

I'll get out.