I research the Irish Family History Foundation's database. It contains 12,000,000 surviving rcds for abt 65% of Irish counties. Rcds are increasingly sparse B4 1840, rare B4 1800.
Note 1 - Without a KNOWN county, the chance of an ancestor's rcds NOT being in this database is AT LEAST 35%.
Note 2 - Only 1/2 of Co. Cork's rcds are in this database.
Note 3 - The RC church kept control over most parish rcds from Tipperary (north). These are ONLY available thru the Tipperary Family History Research center at a substantial fee (regardless of outcome).
From other posts, the Cadden surname may be protestant, and from northern Ireland. This bodes ill for finding rcds.
For Julia Cadden B or M rcds, I found 0 rcds within a relevant range of years.
For John Fitzpatrick B 1824 +/- 2 yrs somewhere in Ireland with the father's forename unknown, I found 64 rcds - far too many to summarize here, but with 12 in 1824 (exact). One MAY be for your ancestor - no guarantee. You will need an exact DOB, parent(s) name(s), and/or placename to pick which, if any, is the right one.
Google the Foundation's name to lead you to this database. Register, opt to be notified as rcds are added and browse. Pls post your search results to my genforum msg.