Pag said afterwards she was bubbling over with undemonstrativeness, which was clever for him.
"Somehow Good"
William de Morgan
Cyril had listened at first with interest; he was becoming much attached to his new friend, and though his masculine undemonstrativeness forbade him to say much about his feelings, his gratitude to Michael was deep and intense, and amid his own troubles he had an unselfish satisfaction in thinking that, whatever his own future might be, Kester's was safe.
"Lover or Friend"
Rosa Nouchette Carey
He spoke gently to her, and she replied with a like undemonstrativeness.
"Tess of the d'Urbervilles A Pure Woman"
Thomas Hardy