The Beloved Stranger (Love Endures) by Grace Livingston Hill

Sherrill Cameron’s big day arrives to find her watching from the balcony as her fiancé’s secretary walks down the aisle in her place. Sherrill is convinced that nothing could heal her hurt, until the day’s gloom is brightened by a handsome stranger who offers constant and comforting help. But Graham Copeland’s welcomed presence turns sour when an heirloom emerald necklace goes missing. Is Graham the true beloved stranger Sherrill thought he was? Despite her reservations, Sherrill finds herself falling for Graham’s charm, but will her new love leave her stranded at the altar once again?