I want to know about the language used in the story "Dusk.""Dusk" by Saki

In his story "Dusk," author Saki employs light/dark
imagery to create a certain mystery in his narrative; in addition, his skillful
utilization of irony and satire enhances the startling effect of his story's
ending.

For instance, the mysterious tone is established
with the light/dark imagery in the exposition of the narrative as Saki writes of the
"faint moonlight," "shadowed gloom," and the "gloaming hour" which disguises the
"unconsidered figures" who move with "bowed shoulders."  In this atmosphere of abject
figures in the twilight, Saki's character of Norman Grotsby, who takes cynical pleasure
in watching the others, seems somewhat superior since he has only failed in what Saki
terms a more "subtle ambition."  With this subtle word choice which suggests Grotsby's
superiority, and his demonstration of mental acumen as he detects the flaw in the young
man's tale of being lost after stepping out of his hotel for soap, the satiric irony of
Gortsby's error in thinking that the soap discovered under the bench after the young
man departs belongs to him is startling.

In order to
further enhance the irony and satire, Saki's diction creates credibility on the part of
the young man.  For example, Saki writes that the young man possesses a "look of
disarming frankness," and he makes "an eloquent pause."  When Gortsby does not seem to
believe him, the youth displays "a suggestion of resentment in his voice."  Further,
this diction disarms the unsuspecting reader as the
youth 

threw a
good deal of warmth into the last remark, as though perhaps to indicate the hope that
Gortsby did not fall short of the requisite
decency.

Thus, the diction of
the narrative about the young man who talks in the shadows of twight to the cynical
Gortsby, who seems the superior man of the dialogue, enhances the satire of human nature
as well as the startling irony of the last line of the story.