Wilson’s glazed eyes turned out to the ashheaps, where small grey clouds took on fantastic shape and scurried here and there in the faint dawn wind.

– F. Scott Fitzgerald

The Great Gatsby, Chapter 8. After Wilson’s wife is killed, he fells into a depression. He gazes out to the valley of ashes that symbolizes his sadness. The dispirited Wilson will kill the person he thinks is responsible for his wife’s death, then kill himself.