Rebecca Darnell (death of Lucy Fage)

Rebecca Darnell registered the death of my 4xgreat-grandmother, Lucy Fage, in 1879.  I don't know what, if any, relationship she had with Lucy. In the 1871 census, she is living with her husband and family in Northill, though not in the Lower Caldecot part of the parish, where Lucy was living.  She was a strawplaiter at that time, aged 42. By the 1881 census, the family is living at 'No.,8 gardens back from the road' in Upper Caldecote.  So I am still none the wiser ... perhaps the solution will pop up soon.