The 1851 census shows that Mary and Frederick of Upper Brook were both born in Droxford, Hants.
I have looked at the baptism registers for Fredericks baptism. His name is not common at that time and I found 30.12.1821 Frederic BB of Mary Lucas at Sherfield bapt Droxford.
Have not yet found a marriage of Mary or anyone to a Richard Lickblade.
Mary Lickblade does not appear after the 1851 census.
Mary Lucas is not on the 1851 census.
I have got a death cert for Mary Lucas (charwomen) age 72 of Middle Brook St. 7.7.1853
Present at death was Jane Knight her neighbour from the 1851 census.