I don't have the marriage record, only a family history written by Edward Charles Berry. He names his father as the younger son of Cuthbert and Sarah, and talks about his mother's memories of Cuthbert and Sarah. I hope to update this on ThePeerage.com when I get a chance.
I recently started some brief work on the family history (I am a descendent of Harold Lea) and have not run across any references to Frederick Barnard so far. Approximately when do you think the link might have occurred? I only have written down my own descent from George, but my grandfather has other records.
All the best,