He started at Falcon Pt. During upkeep, he discarded 2 clues, filling up the Feds Raid Innsmouth track. After the raid, during the movement phase, he chartered a boat to Devil Reef, where a Dark Young was waiting for him. He threw some petrifying solution at it, which would have missed, except that he was a marksman. Then, during the encounters phase, he found an abandoned boat at the reef and rowed his way to the river docks, where he had an encounter. At the docks, he found a noxious corpse clutching a strange item in its webbed hands. It turned out to be a Warding of the Yellow Sign, which Darrell used on Y'ha-nthlei.
And of course the person playing Darrell was a novice, so he had no idea what was going on.