Sylvia was born in 1882, a daughter to Brownlow RC. (1851) a Land Agent and Marion J. (1855). She had three siblings: Avril F. (1885), Iris M. (1886) and Geoffrey (1892). The family had two servants Elizabeth Brown (1879) and Margaret Cartwright (1879) along with Fanny Davies (1874) a cook, Agnes McLellan, a Parlour Maid and Louise Deggen (1864) a Swiss Governess.
Sylvia was engaged as a nurse to the Shropshire 36 VAD on 17 June 1916; she was posted to an unknown Military Hospital in France and served there until 14 November 1917. She was then transferred to Parkhurst Military Hospital, Isle of Wight where she stayed until 17 September 1918. She was awarded the British War Medal and Victory Medal.
In 1939 Sylvia was living with her sister Iris a State Registered Nurse and her brother Geoffrey in the family home where they employed one servant. Sylvia became Commandant for the Shropshire 26 VAD.