Facile, adjective: without depth; superficial.

Source: http://www.dictionary.com/browse/facile

We encountered at the end of the first paragraph of chapter 3 of Quicksand. The author uses the word to describe how the campus at Naxos was beautiful, but only in appearance.

“On one side of the long, white, hot sand road that split the
flat green, there was a little shade, for it was bordered with
trees. Helga Crane walked there so that the sun could not so
easily get at her. As she went slowly across the empty campus
she was conscious of a vague tenderness for the scene spread
out before her. It was so incredibly lovely, so appealing, and so
facile. The trees in their spring beauty sent through her restive
mind a sharp thrill of pleasure.”

Snatch, noun: a brief, fragmentary, or hurried part.

Source: https://www.merriam-webster.com/dictionary/snatch

We encountered the plural form of this word in the second chapter of Quicksand. It is used to describe the activity that Helga hears outside her door while she hides in her room.

“In the corridor beyond her door was a medley of noises
incident to the rising and preparing for the day at the same
hour of many schoolgirls—foolish giggling, indistinguishable
snatches of merry conversation, distant gurgle of running water,
patter of slippered feet, low-pitched singing, good-natured
admonitions to hurry, slamming of doors, clatter of various
unnamable articles, and—suddenly—calamitous silence.”