All the marriage rego states is "Also James Martine in Riddeingi (?) and Margaret Grieve were proclaimed for the last time and married on the 16th instant February 1835". So no clues there unfortunately. I found this marriage rego in ScotlandsPeople.
The only way I know that Margaret and James were Rachel's parents was her statement on her marriage certificate, on her death certificate. Both of these documents, along with the 1850 census indicate that Rachel was born in 1837.
I'm not sure where to search the 1841 census of England - so no, I havnt dont that yet. Any ideas on where to search that?
Thanks!