@Pink Kitten Leofwine could have easily brought it up in conversation while he was stocking up on supplies (and in fact, I'd imagine that he would be the one trying to organize all the volunteers--Lawful Neutral, make sure everybody's on the same page, you know?)and then her Pact Mistress could have been like "Follow him. Do it, do it, do it, do it, do it, do it, do it."