In the July to September 1884 birth index Pancras, London, Middlesex, Lydia Katie Symondson volume 1b page 175

In the 1891 census St Pancras civil parish, St Pancras ecclesiastical parish at 88 Allcroft Rd.
Alfred E. Symondson married, age 27 born at St. Pancras, wharehouseman Somerset House.
Wife Lydia A. Symondson age 27 born at St Pancras.
Sister Kate B. Symondson mantelmaker dress, age 17 born at St. Pancras.
Daughter Lydia K. Symondson age 6, born at St Pancras.
Daughter Edith K. Symondson age 4, born at St Pancras.
Son Alfred H. Symondson age 3. Son John H. Symondson age 1.
[Note There are Symondsons living at 3 different residences on Allcroft Road in this census Frederick at #4, Henry and Horace at #8 and Alfred and his familiy at #88]

In the 1901 census living at 38 Grafton Terrace, St Pancras civil parish,London, St Andrew eclessiatical parish, St Pancras district, Kentish Town sub district.
Alfred Symondson, age 37, principal warehouseman Somerset House, born at Kentish Town, London.
wife Lydia age 37 born at Hampstead, London.
Daughter Lydia age 16, dressmaker, born at Kentish Town, London.
Daughter Edith? age 14, born at Kentish Town, London.
Son Alfred age 13, born at Kentish Town, London.
Son John age 11, born at Kentish Town, London,
Son Percy age 7 born at Kentish Town, London,
Son Frank age 4, born at Kentish Town, London.
Daughter Dorothy age 1, born at Kentish Town, London.

In the 1904 April to June death index is listed Lydia Kate Symondson, age 19, St Pancras, Greater London, London volume 1b page 75