The early parish records would be baptism dates and not birth. On occasions baptism’s occurred months or years after birth, but birth date not often recorded. Also, look at other local parish records, as Elizabeth and / or James may well have been baptised nearby. My family events where recorded in about ten different parish records around Dickleburgh, so keep looking.
Have you visited this site... https://familysearch.org/search/collection/show#uri=http://f...