The Misjudged Mr. Hartley (1915)

In honor of his return from abroad, Mrs. Worthington invites her cousin, Brian Hartley, to dinner that evening, but forgets to tell him she has moved from her old address. He goes to the old home where he is met at the door by Celia Thayer, a guest of the Holbrooks, who now occupy the residence. None of the family being at home, Ceclia admits him, thinking he has been invited to dinner. When her hostess does not arrive the two have dinner together and become quite infatuated. Later it develops that the house was robbed while Mr. Hartley was there and, of course, he is suspected.