In 1897, Beth hides Jamison in the drawing room after he escapes from the Trasks' school. When Charity and Tim come to look for him, he slips out the window.
IIRC, the werewolf jumps through the window of the Old House to attack Jeb Hawkes.
In 1970, when David and Hallie are under Gerard's influence, they climb out the window of David's room, where they have been locked for their protection.
ProfStokes