Threads of Gold by Joan Marr

'Threads of Gold' is the fourth and final book in the historical series 'Circles of Silver' The book opens during World War II in England, when one of the rings comes into the possession of a young man. After he loses his parents in the bombing, Tom makes his home with his mother's family in Ireland. The second ring, brought to Australia by Patricia Byrne in the 1800s, has been passed down in the family. Jackie treasures it and unknown to her, is also destined to travel back to Ireland, returning the elvish silver to its origins. Is the magic conspiring to bring two people together again, and to aid them in their quest to find the fabulous ancient king's treasure?