Fistful of Digits is one of the side quests you can do during your stay in Edgewater. This page of the guide The Outer Worlds includes a walkthrough of this quest.
- Take Dr. Maybell's finger
- Take Bertie Cotton's finger
- Take Guillaume Antrim's finger
- Hand over Dr. Maybell's finger
- Hand over Bertie Cotton's finger
- Hand over Guillaume Antrim's finger
Go to the police station in Edgewater. Enter inside and talk to Constable Reyes. During the conversation, the woman will ask you to deliver the fingers of three marauders. Their locations are as follows:
Bertie Cotton  is in the area of a small depot of containers. You have to be careful because he can stand on the roof of one of the constructions. If you don't sneak, he can spot you.
There should be no other marauders in the area during this task, so Bertie is a relatively easy target, especially if you are with a companion. Remember to get his finger before you go to the next location.
Dr. Maybell  will cause you more problems. She is in a cave inhabited by marauders. Don't try to force your way in. Instead, attack the enemy patrolling the area near the entrance. You will attract the attention of other opponents. They will run out - you can use the surrounding rocks as covers. After the fight, take Maybelle's finger.
Note: The location in which the third marauder - Guillaume Antrim - resides is related to A Few Kindred Spirits side quest. If you got to the Botanical Labs and promised to find Zoe, you can complete both tasks at the same time.
Guillaume Antrim  is also accompanied other marauders. The safest way to fight them is to stand somewhere on the outskirts of the city and use rocks as covers. After the fight, take Antrim's finger.
To complete the task, you need to go back to Constable Reyes and give her the fingers.