St Mary (England Hertfordshire Sawbridgeworth), "Register of Baptisms (1813-1842)", page 98, Baptism of Sarah Louisa Brown, 8 October 1815; digital images; Findmypast (http://: accessed 31 December 2018)

Text from source:

Baptisms solemnised in the Parish of - in the County of - in the year 1815
No. When Baptised Child's Christian Name Parents Names Abode Quality Trade or Profession
Christian Surname
No. 173 8 Oct 1815 Sarah Louisa Samuel and Mary Ann Brown Game Keeper of Pishobury