they were deliciousso sweetand so cold (9-12)
These lines are weird for an apology, and, in their own way, kind of hilarious. We can imagine the speaker grinning, thinking about how yummy the plums were, and then writing about them, forgetting (or maybe not) that the person he's writing the note to won't get to eat the plums in the first place. But, instead of having a malicious intent, we think our speaker was trying to share some of his satisfaction, and give a little deliciousness to the person reading the note. At least that's a happy ending.