Miss Sarah Rebecca Daniels was born at 18 East Street in Marylebone, London, England on 10 November 1875. She was later baptised on 2 January 1876 in St Marylebone, Westminster.
She was the daughter of Samuel Daniels (b. 1835), a zinc merchants porter, and Catherine Mary Warren (b. 1840), both London natives. Her siblings were: Samuel (b. 1868), James John (b. 1869), Catherine Margaret (b. 1870), Benjamin (b. 1873), Mary (b. 1874), Christopher (b. 1877), Jane (b. 1880) and Joseph (b. 1882).
She appears on the 1881 census living at 18 East Street in Marylebone, London. By the time of the 1911 census she was working as a domestic servant at Valkyrie, 12 Cranes Park Avenue in Surbiton, Surrey, the household of a George William Dibben and his family.
Sarah later came into the employment of the Hudson Allison family of Montréal, Québec and was enlisted as a maid to the family. She boarded the Titanic at Southampton on 10 April 1912 as a first class passenger travelling with the Allisons, Hudson and his wife Bess and their two infant children Loraine and Trevor and their children's nurse Alice Cleaver (ticket number 113781 which cost £151, 16s). A further two servants, Amelia Brown and George Swane, travelled in second class.
On the night of 14 April, after the ship hit the iceberg, Sarah decided that something was wrong, and went out by herself to investigate, unable to convince either Hudson Allison, who became angry at her for awakening the family, nor Alice Cleaver, to join her, or that there was any danger. She then encountered several crew members who directed her to lifeboat 8, and assured her that "it was just a precautionary measure", wherein she boarded the lifeboat, which was then lowered from the ship.
Her employers, the Allisons, along with their baby daughter Loraine, died in the sinking, infant Trevor being the only survivor carried off the ship by his nursemaid Alice Cleaver. Aboard the rescue ship Carpathia it was reported that Alice Cleaver refused Sarah Daniels access to baby Trevor.
What became of Sarah Daniels is not entirely certain. It is alleged she remained in Canada, possibly in Montréal, where she is believed to have married and lived out her life.