I had a look through the rest of the Crawfordjohn Deaths Records and there is another Black who lived at Strand, which must have been a hamlet or farmtown. This may be the father of David who died in 1843 perhaps?
WILLIAM BLACK, Strand, aged 75 years, husband of the late Janet Neilson.
20th May 1853, buried in this churchyard.
Here is an interesting entry from the Death Records, probably not related to you but a good example of what can be found in these records.
BARBARA MOFFAT, Strand, aged 77 years, married in 1804 to John Smith who, after the marriage, deserted her.
1st November 1841, buried in this churchyard.