St Mary (England Hertfordshire Sawbridgeworth), "Register of Baptisms (1813-1842)", page 37, Baptism of Martha Brown, 25 December 1817; digital images; Findmypast (http://: accessed 31 December 2018)

Text from source:

Baptisms solemnised in the Parish of - in the County of - in the year 1817
No. When Baptised Child's Christian Name Parents Names Abode Quality Trade or Profession
Christian Surname
No. 289 25 Dec 1817 Martha Samuel and Mary Ann Brown here Game Keeper