I'm afraid there will be nowhere else you can look for records.
Parish registers are the only source of baptism records in the early part of the 19th century. And if the parish registers do not exist then, unfortunately, that is the end of the line.
I did check Roots Ireland (subscription site) for a baptism record for Patrick but did not find one. Roots Ireland has records not available on other databases and sometimes you can be lucky.
I also checked there for a marriage record for Thomas and Honor, again, no luck.
Very few parishes recorded deaths. It was not until 1864, when civil registration was introduced, that death records became the norm, so again, you will not find a record of Thomas Higgins's death.
Regarding the entry in the registers for Darrery. There would seem little doubt that the priest meant Darrary, whether North or South is of little difference to the priest, the two townlands border each other.
Here is a link with a map so you can see the location of both.