Complex sentence: Finding Danilo's space at the desk empty, Njegus asks where he is, and Kromow and Pritschitsch comment that Danilo is out drinking--so Njegus sits at Danilo's post at the desk, and together the four men go through the paperwork.
Split into simpler sentences: Finding Danilo's space at the desk empty, Njegus asks where Danilo is, and is told by Kromow and Pritschitsch that Danilo is out drinking. So Njegus sits at Danilo's post at the desk, and together the four men go through the paperwork.