These words are from the book "The Snow Garden" by Christopher Rice.
Carrel = a table or desk with three sides extending above the writing surface to serve as partitions, designed for individual study, as in a library.
Chiaroscuro = the distribution of light and shade in a picture.
Cladding = the act or process of bonding one metal to another, usually to protect the inner metal from corrosion.
Subsumed = to take up into a more inclusive classification.
Sylphs = (in folklore) one of a race of supernatural beings supposed to inhabit the air.
Thrall = a person who is morally or mentally enslaved by some power or influence.