Queen Locke does tell Desmond when they meet that he worked for a box company:

DESMOND: Shut it. [He throws a rope to Kate] Tie him up. Do it!
LOCKE: Wait. Wait, wait -- you're tying up the wrong person.
DESMOND: How's that, brother?
LOCKE: It's pointless to tie me up, I'm not dangerous. But her, she's a fugitive.
DESMOND: So, what does that make you then, brother?
LOCKE: I'm a regional collections manager for a cardboard manufacturer -- boxes primarily.
DESMOND: All right then, box man, tie her up.

Transcript from Lostpedia "Adrift" I think =)

__________________
Please don't give up, Des. Because all we really need to survive is one person who truly loves us. And you have her. I will wait for
you. Always. I love you, Pen

DESMOND: I love you, Penny. I've always loved you. I'm so sorry. I love you!
PENNY: I love you too.
DESMOND: I don't know where I am, but--
PENNY: I'll find you, Des--
DESMOND: --I promise--
PENNY: --no matter what--
DESMOND: --I'll come back to you--
PENNY: --I won't give up--
BOTH: I promise. I love you.