Immigration to the US in 1839 sort of precludes any records for Ireland.
Tithe Applotments www.genealogy.nationalarchives.ie
Griffith Valuation for Cork 1852/53:
9 Lesters listed:
Charles Lester St. Paul's
Davies Lester, St. Paul's
Sarah Lester, St. Paul's
Samuel Lester, St. Peter
John Lester, St. Peter
John Lester, St. Peter, Cork City, Poor Law Union Cork
tenant of William Johnston
11/13 Peter Street house and yard
Samuel Lester, St. Peter, Cork City tenants x 2 of Reps. Aylmer A. Martin
18/16 house and yard
19/15 house, workshop & yard
1824 Commercial Directory - no Simon
Anne Lester, straw hat maker, also 1846
Richard Lester, Blockmaker & pump maker 7 Paul St.(1846)
Samuel Lester, cabinet maker (1846) 16 Duncan St.
John Lester 1846, block & pump maker 53 Paul St.
John Lester 1867, block & pump maker Lucia Place Passage & Glenbrook
William Somerville, Parish St. Trinity
10/14 Fish Street house and yard, tenant of Seward Large
Robert Somerville, St. Trinity, tenant Rev.John C. Martin
21/either 23/25/26? Grafton St. Alley off George's St.
Other names of Somerville are David, John, 3 x Andrew, Letitia, James, Thomas who owns land In Fee, also Philip
who owns land.
Cork City birth records are on www.irishgenealogy.ie
so perhaps some death records also?
There is also an Irish History Center on line with records for almost all Ireland (not Cork City) www.rootsireland.ie
and Sabina is quite unusual so you maybe able to find her with just her name and year of birth. That is if she is from Ireland.
You could try "Registry of Deeds" Ireland (look for rootsweb)
+ Cork both have more info that census
parish records, grave stone inscriptions and various other
bits and pieces.
St. Paul's was renovated in 2009, built 1723 and became a parish when St. Mary Shandon was divided.www.corkrecords.com/St.Pauls
pictures and inscription from gravestones - most are
too old to read
You can try www.familysearch.org
for persons who died after 1864, but 1851 would be a Parish record.
PS there are just 6 Lester's in the Cork telephone book, 1 letter 6 copies and stamps are inexpensive. Its worth an
effort and perhaps you will get someone there interested
as you might find there is less interest there an in the US,
Australia and Canada.