Laura Brown was one of many people that vanished in Swallow Woods in an alternate timeline.
When Amy Pond met her, she had been gone for only ten days. But in the woods, where time ran differently, sixty-one years had passed for Laura. When Reyn's ship was finally able to leave Earth, she and Emily Bostock and Harry Thompson decided to go with it. The ship returned everyone else it had taken to before it had taken them. This meant that in the restored timeline, only she and Emily and Harry had ever disappeared in the woods. (PROSE: The Way Through the Woods)