The parish register records for the Catholic parish of Kells are available online, going back to 1791, so you could try looking for John and Anna there in the 1840's (in case they were from the same parish). The records for that parish can be accessed at this link:
https://registers.nli.ie/parishes/0940
The record you have mentions both Drumbaragh and Carnaross. Those are two different townlands located close to one another, west of the town of Kells. Carnaross may be in the next Catholic parish to the north, which is also called Carnaross, which has records back to 1805. You can use the interactive map at the above link to move to the records for that parish.
Carnaross is in the civil (administrative) parish of Castlekeeran (which also goes by other names), which straddles the Meath/Cavan border. Drumbaragh is in the civil parish of Kells. Catholic parishes and civil parishes do not always have the same boundaries (or even the same names at times). To complicate things, the boundaries of both townlands and civil parishes have been adjusted over the years, and were not standardized until the late 19th century (with some additional changes after that), so you may have to check both parishes. Baptismal records usually name the townland where the family lived, and if you locate that in the parish register, you can find more info about the townland itself by choosing it from the list at this link:
For Kells: https://www.townlands.ie/meath/kells/
For Castlekeeran: https://www.townlands.ie/cavan/loughan-or-castlekeeran/
The pages for each townland also show links to other info, such as census records.
For the townland of Drumbaragh, you can find more info at this link:
https://www.townlands.ie/meath/upper-kells/kells/boherboy/drumbaragh/
The town (and townland) of Kilskyre/Kilskeer is just a bit to the south of Drumbaragh, so all three of these townlands are fairly near one another, even though they may be in separate parishes. You can see more info about Kilskyre/Kilskeer at this link:
https://www.townlands.ie/meath/upper-kells/kilskeer/kilskeer/kilskeer/
Although Kilskyre/Kilskeer is near the other townlands, it appears to be across the parish border in the Catholic parish of Kilskyre, and you can access the Kilskyre parish records (going back to 1784) by using the interactive map mentioned above once again.
