Sentence:  Appleby ... rose from his seat when Morales came in. He shook hands urbanely, unbuckled his sword, and laid his kepi on the table, and then sat down with an expression of <WSD>concern</WSD> in his olive face which Appleby fancied was assumed. 
Meaning of the word marked with <WSD> tags:  The expression of solicitude, anxiety, or compassion toward a thing or person.