Was this the death you found?
BLAKEY, ELEANOR 32
GRO Reference: 1849 M Quarter in NEWCASTLE UPON TYNE UNION Volume 25 Page 253
If the age is correct gives a birth year of 1817 so younger by four years than the Eleanor that Davy has. Also Davy's Eleanor appears alive and kicking in the 1871 census.
Doesn't matter what you try nothing promising shows up.