An auctioneer sold neckties, and while Jack was there Billy asked him if he was hungry. Jack said he "ate" but the auctioneer thought he said "eight", as in eight neckties, so Jack was force to buy 8 neckties.
Donne is using both personification and apostrophe in these lines. He is using apostrophe when he speaks to death as though it were a person who could hear it and respond to him. he also personifies death as if it were a person who could feel proud or be "mighty" and "dreadful".
It would make the relationship between Ireland and England stronger