Then came the frost, and everything was frozen solid, and outside in the passage an icy blast blew continually, and in places beneath broken ventilators a few inches of frozen snow lay for weeks unthawed inside the fort.
"The Escaping Club"
A. J. Evans
What heart could remain unthawed, and what lips could keep its secret, on leaving the gloomy streets of the Marais for the first time since the previous autumn, and entering the smiling and picturesque valley of Montmorency; on seeing it in the morning light, its endless horizons receding from view; and then lifting a charmed gaze to eyes which expressed no less infinitude mingled with love?
"A Second Home"
Honore de Balzac
The snow in the first was dissolved in sixteen minutes, while the latter had a small unthawed proportion remaining at the end of eighty-five minutes.
"The Earth as Modified by Human Action"
George P. Marsh