The Regent's Daughter by Alexandre Dumas

In spite of the cracking of the ice, Gaston pursued his way boldly, and perceived, with a beating heart, that the winter rains had raised the waters of the little lake, so that he might possibly be able to reach the window.

He was not mistaken; on giving the signal, the window was opened, then a head appeared nearly at the level of his own, and a hand touched his; it was the first time. Gaston seized it, and covered it with kisses.