[quote=@Xaltwind]

As for lack of water. I'm sure that eventual future mining into the unknown surrounding underground will yield a flooded room and hallways or two at some point~
[/quote]

Give Gentle 4 pick axes and a direction. Just make sure to check on him every 5 minutes or so incase he gets distracted, goes the wrong way, starts having a conversation with himself, puts the pick axes down, etc