Roger,
Thank you for reaching out. I have been rather lax in my research lately. Kids and life keep one hopping.  So great to meet another Shields relative.  I would dove to share my research. I will send you a pm.  My great great grandmother was Emily Shields who married William Nixon. They immigrated to America in the early 1900s. William Shields and Frances Milner would be my gggg grandparents.
- Kristin