He could not help contrasting Katharine with his vision of the engaging, whimsical Cassandra; Katharine undemonstrative, inconsiderate, silent, and yet so notable that he could never do without her good opinion.
"Night and Day"
Virginia Woolf
The audience listened quietly and their credence seemed but the undemonstrative acceptance of an every-day fact.
"My Attainment of the Pole"
Frederick A. Cook
Indeed, the French Navy is so undemonstrative one might imagine it recruited entirely from the Englishmen of modern fiction.
"Command"
William McFee