It's a hard life being an adventurer between adventures. At this time of year nothing seems to happen. The days drag by, your resources dwindle, and nobody pays attention to you any more. You were complaining about this to a friend of yours only last night. She didn't seem too sympathetic (she laughed) but she did mention a merchant friend of hers who needed a few extra guards for the rest of the week. So you decided to apply. It may not be glamorous, but guard duty pays the bills between real adventures.