Paula,would these censuses pertain to your family as well?
1860 US census: Calaveras,Calif James Whirrity age 32 born 1828 Ireland
1880 US census: San Andreas,Calaveras,Calif James Whearty age 50 born 1830 Ireland parents both born in Ireland occupation:miner married Bridget Whearty wife age 47 born 1833 Ireland parents both born in Ireland Mary Whearty daughter age 16 born 1864 in California parents both born in Ireland occupation:at school
1870 US census: Plumas,California Peter Wheirety age 33 born 1837 in Ireland occupation:farmer Mary Wheirety wife age 33 born 1837 in Ireland occupation:keeping house Eugene Wheirety son age 9 born 1861 in Calif Mary Wheirety daughter age 6 born 1864 in Calif Lizzie Ann Wheirety daughter age 3 born 1867 in Calif Ida Josephine Wheirety daughter age 1 born 1869 in Calif Thomas Farley farm labour age 28 born 1842 in Ireland
1900 US census: Beckwith Township,Plumas,Calif Peter Wherity age 68 born Aug 1832 in Ireland parents born in Ireland married 40 yrs(1860 estimate) immigrated 1853 Jacob A Bender boarder born Denmark
also,found this which is curious; 1900 US census: Beckwith Township,Plumas,Calif Nickolas Wherity age 28 born 1872 in Calif parents both born in Ireland Mary Wherity mother born Ireland parents both born in Ireland married 36 yrs 8 children born,8 children living immigrated 1855 Ida J Wherity sister born 1870 in Calif parents both born in Ireland this appears to be Peter's wife.?Is this possible one of Peters children or are Ida and Nickolas children of a different brother?
Births: county Louth;
Patrick Whearty 1828,1831,1833,1837,1840 James Whearty 1833
1796 Flax Growers Lists: county Louth;
Dennis Whearty civil parish:Dyzart James Whearty civil parish:Clogher James Whearty civil parish:Termenfeckin Nicholas Whearty civil parish:Clenmore Patrick Whearty civil parish:Port Patrick Whearty civil parish:Termenfeckin
1837 some residents of Drogheda,co Louth: Richard Whearty West Street house
1842 Voters List: name:James Whearty residence:Cartown in what right registered:leaseholder situation of property:Cartown barony:Ferrard name:John Whearty residence:Galroostown in what right registered:leaseholder situation of property:Galroostown barony:Ferrard name:Patrick Whearty residence:Gallagh in what right registered:Freeholder situation of property:Gallagh barony:Ferrard
1865 Voters lists: county Louth; voter name:James Whearty voter address:Cartown name of landlord:Miss Chester barony:Ferrard voter name:Patrick Whearty voter address:(Carstown)Tullyescar name of landlord:Mr Smith Barry barony:Ferrard
What I would do next is to go to your nearest LDS library and look through the microfilms for St Peter's parish in Drogheda, county Louth as I came across many,many Whearty/Wheritys when looking at records pre 1850.Rootsireland.ie has many Wheartys in county Louth for marriages and births-maybe you will find parents,sisters etc.The only thing about the site is you have to pay to see lists of who comes up as well as to view copies of the records.If name is spelt wrong to actual record it won't come up mant times until you enter correct spelling.Can be pesky.Hope this helps,Kim