Looking at Gloucestershirebdm : there appears to be two death entries (?not sure why)- both for James Cowmeadow age 20 in 1838. Perhaps these certificates would give more information i.e.

When and and where:
Name and surname:
Sex:
Age:
Occupation:
Cause of death:
Signature, description and residence of informant:
When Registered
Signature of Register

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Surname: Cowmeadow

Given Names: James

Age: 20

Year died: 1838

District: Monmouth, Coleford

Register 1:

Entry: 157

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Surname: Cowmeadow

Given Names: James

Age 20

Year died: 1838

District: Westbury on Severn, Newnham

Register: 1

Entry : 202

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Freebdm - just has one

COWMEADOW James (no age given) - Oct/Nov/Dec Qtr 1838 - Westbury on Severn, Vol 11: Page 324