Searching for Shona by Margaret J. Anderson, a WWII evacuation story

Marjorie Malcolm-Scott leads a lonely but privileged existence in Edinburgh, living with her Uncle Fergus, who has been gone for months (war work?) and his disagreeable housekeeper, Mrs. Kilpatrick. Sometimes when she is sent outdoors to play, she goes to the local park and observes the rough and tumble orphans from St. Anne’s.