This quest will become available if the Vipers have been dealt with and a caravan is delivering food to the Ciphers. Because the caravans cannot make it up the narrow trail to the village, the Ciphers need to come down into the canyon. A group of slavers, having heard about the developments at Mesa Verde, decided to pose as a caravan and get some Cipher slaves. The ruse worked, and several Ciphers, children included, have been captured. When the player returns to Mesa Verde, Azkee will greet the player at the entrance and tell him what happened. The slavers headed northeast, towards the Caesar's Legion group at Denver.
Science Boy - Using your tracking skills, examine the slaver camp for clues: "The tracks veer to the northeast, and have a great deal of dogshit mixed in them. The Ciphers didn't say anything about them having dogs, so wherever these guys are from, there must be a LOT of dogs (assuming the PC has never been to Denver)." (Outdoorsman/Average) The Ciphers aren't aware of such a place, but Isaac will tell the PC that Denver is notorious for its canine population.
There were two proposed Journal Entries. One would be the regular entry, and the other would be a "Dumb Journal Entry" presumably the one you'd see if you had low Intelligence. The entry also shows the different ways of finishing the quest.