You can get the miscellaneous quest by visiting Moss Mother Cavern for the first time. Outside, you'll find a man named Valdr outside who will beckon you to come over to him. He's hurt and advised he and two hunter friends drove a bear into the cave before being jumped by Spriggans. Heal him up by either using magic or giving him a potion, then tell him you'll join him to recover his friends bodies in the cave to start.
Note: I personally found this quest while going and getting a journal for Runil, the priest of Arkay in Falkreath. You may as well kill two birds with one stone here...
Head inside and you'll see Ari, one of the hunters, dead on the ground. Up ahead is a Spriggan for you to take out. Past that down the corridor is the bear. If you've got ranged you can attack it back where you took down the Spriggan to protect yourself (if you can't go toe-to-toe with bears yet that is). Once you take it out you can find Niels body by where it was. You'll surely notice the lake here. By the lake's shores another Spriggan will show up, and if you take the right path up a ways another one will show up, so use that knowledge to fight them one at a time.
Once they are both dead, Valdr will thank you and give you 'VALDR'S LUCKY DAGGER', which is a steel dagger that has a chance to critically hit 25% of the time. Now go up the right path to find a chest to loot before you leave. That's the end of this quest.