Nice Pictures!
Richard Garrett married Elizabeth Maher in 1864 in Lambeth. If you would like to buy the certificate:
Dec q 1d 621
Alice Maud Garrett married William Bevins (a Manchester warehouseman) in 1905 in Southwark. They had two daughters I can find (but can't give details of possible living people).
The youngest daughter (Alice Maud N Francis nee Bevins - 1912-1987) married in 1933 and had a son and a daughter.
Alice Maud Bevins died in 1968 in Greater London.
You have the family in the 1881 census where Elizabeth is a chair caner. She gives her POB as Southwark - so she's not the Irish one!
I have an ancestor as well, born in 1859 and the family always said she was Irish. However, she was born in Strand and her parents were Irish so maybe it's the same with your Elizabeth.
1881 census
117 Snowsfields, Bermondsey, Surrey
RG11 0558/16 26
BROWN
James, Head, M, 44, born Hertford, Tallow Sampler [probably meant to be chandler]
Charlotte, Wife, M, 45, born Worcester
Sarah A., Daur, 9, born Bermondsey
Ellen K., Daur, 6, born Bermondsey
Alfred J., Daur, 4, born Bermondsey
Plus two boarders: George Harrington, 52 and John H. Fudger, 19 - both unmarried general labourers.