Hmm just to confuse things totally

There is a Mary Lewry born in Maresfield 1839 to Daniel Lewry and Mary Martin. I went to the Sussex Weald site and found that. But that doesn't explain where the names Sarah and George came from.
Of course as Daniel's grandfather was born in Keymer they could be distantly related and the Sarah and George's Mary went to Maresfield to work with distant cousins??
I can't find any other census records for Mary and presume she must have died before 1871, perhaps of Scarlet Fever. I'll try and trace this other Mary and see if I can rule her out.
Kerry