I don't tere is a list of passenger returning to England
I think this is your Richard Land wife Elizabeth 2 children
it seems the children were born in England since they arrived with their parents
New York Passenger list 1820-1957
Name: Richard Land
Arrival Date: 8 Dec 1841
Birth Date: abt 1814 Age: 27
Port of Departure: Liverpool, England
Port of Arrival: New York, New York
Ship Name: Alfred
Elizabeth Land age 29
2 children arrived with them does not indicate sex of children
1. age 4 ?
2. age 2 could be Lillian or William?
occupation: book _____________?
NOTE: even that is questionable really bad copy to read.
They would have had to stay in America to be counted in our 1850 census
good luck in your search