Sentence:  Terry, author of the indispensable "Terry's Guide to Mexico", has a name for it – <WSD>atrabiliousness</WSD>. "The defect of many of the murals," he says, speaking of those in the orphan asylum, "is the facial <WSD>atrabiliousness</WSD> of some of the subjects. To the observer it minimizes the grandeur of the conception ..." 
Meaning of the word marked with <WSD> tags:  Grumpiness, irritability, melancholy, moroseness.