The two columns of Jurors have slightly different headings, which I have only just noticed. The first column is headed
The Names of the Jurors to enquire for our Sovereign Lady the
Queen and the Body of the County.
The second column is headed
The Names of the Jurors to enquire between or Sovereign Lady the
Queen and the Prisoners indicted.
This clearly differentiates between the two sets of Jurors, and probably accounts for the first column having numbers followed by a J, and the second coulmn having only a J. It still doesn't help determine the meaning of the numbers, however.
The second column seems to indicate that the Jurors are involved in criminal cases, and because of the reference to the "Body of the County", might these jurors be involved in inquests on the death of a person?
However, I know from checking other Quarter Session records that at least one fellow mentioned in the second column was also involved in at least three inquests as to the death of people.
To add to the puzzles this document raises, the very bottom of the list has this:
A note at the bottom of the document states that “Each of the Jurors aforesaid is separately attached by pledges To Wit Job Doe and Richard Roe”