I am trying to work backwards on this, I was searching for Ethel Margaret born, your date 1882, I cannot find a birth for that but I have found the following
The only Ethel Margaret Gregory I can find was born 21/02/1884 Fulham
Baptised 13/04/1884
St Anselm Fulham and Hammersmith
she was 1 of twins other half was Clarissa Hannah
father Harry Laurie , mother Clarissa Martha
address 10 Salisbury Terr
fathers occupation a fishmonger
The only reason I am writing about this one is the familiarity of the name CLARISSA, you stated Snowdrop was living with her grandmother Clarissa, this just popped out at me, hope I am not barking up the wrong tree
Louisa Maud
PS, ADDED
Clarissa Margaret Gregory married Dec qtr 1899 to George Deal Pendered,
30/10/1899
George Deal Pendered 42 widow musician father Charles Deal Pendered
to
Clarissa Martha Gregory 40 widow father Thomas Cooper
St Saviours Brixton
both father's deceased
add 153 Acre Lane