Janet Clarkinson b1790s

[Cockneyrebel]

Hi,
I am still searching for the parents and siblings of Janet Clarkinson and Robert Henderson who were married in Mor(e)ham, Haddington on 4 Dec 1814 according to ScottishPeoples records. They moved to Sussex before 1841 as they are shown there and she is shown as Gennet; she died there in 1844 at Uckfield, he died in 1855.
His job is given as a grieve or bailiff on a farm. They moved to Maresfield with their daughters, Allison, Jean, Helen and Marion.
Allison stayed in Sussex but Marion went back to Scotland-the others seem to have disappeared altogether!
Any help through this wall would be appeciated.