Hello Anita,
This maybe something or nothing but thought I'd post to see what you think
Is there a possibility she married as
Sarah Ann Dunmow Jun qtr. 1907 Dunmow to
Andrew Rolf Free index 1911 Dunmow Essex Andrew Rolf 1881, Annie 1869 & Walter 1908
1901 census can't find Selina she's not with her parents
1891c her and siblings with their parents John & Ellen
Selina,
Herb Wm. Amos J,
Percy R, Fred E,
Ern Geor,
Ed A,
Chris Burt.
Elsie Ellen, Flor, Claud L
A lot of Selina’s siblings seem to have married in the registration district of DUNMOW
marriages
Ernest George Dunmow Dec 1902
Herbert William Dunmow Mar 1903
Edward Arthur Dunmow Dec 1903
Rose Minnie Dec 1904
Amos John Dunmow Dec 1905
Percy Robert Dunmow Sep 1908
Christopher B Dunmow Jun 1915
Elsie E Dunmow Dec 1917
There's a death for an
Andrew Rolfe Dec 1913 Reg. District Dunmow age 32
Possibly Andrew’s parents (their son is named Walter)
1891 RG12; Piece: 1429; Folio: 81; Page: 14
Walter Rolph 46 Ag Lab.
Sarah wife
Charles William 20
Christopher 16
Edward 14
ANDREW 10 High Roding EssexJessie 7
EDITEDLooks as if the above is not your Selina Ann Dunmow
Ancestry has a public tree for Andrew Rolf with many pictures of Rolf family
married Sarah Ann Dunmow 29 Jun 1907 High Roding Essex witnessed Willliam Sharp & Clara Jane Stone,
Sarah’s father named as John Sweeting with a note saying Sarah Ann widowed prior to her 1907 marriage
Sarah A Sweeting b1868 High Roothing Essex lists her here on the censuses
1881 RG11; Piece: 1814; Folio: 81; Page: 2 – Sarah A Sweeting with parents
1891 RG12; Piece: 1385; Folio: 15; Page: 23 – Ann Sweeting Servant
nothing for 1901 census
found her first marriage on FreeBMD 1892 Dunmow William DUNMOW to Sarah Ann Sweeting
So it looks as if you are back to the 1915 marriage in Thanet Kent for
Selina A Dunmow to Alfred Davenport
Still can't find Selina on 1901 or 1911 census
Could she have gone abroad for a time?