This walk through is purposefully skeletal, so you won't accidentally see something that you don't want to see.
-Go south. Examine the crack. Go east. Turn the dial to 1. Pull the lever.
-Go west. Go north. Go north. Examine the plinth. Go north. Get sand. Put hose in lake.
-Go north. Put sand in chute. Examine hopper. Get case. Go East. Look under chair. Get stick.
-Go west. Go south. Go south. Go south. Go south. Go east. Turn dial to 2. Pull lever.
-Turn dial to 3. Pull lever.
-Go west. Go north. Go north. Go north. Get shovel. Go north. Go east. Get coal.
-Go west. Go south. Go south. Go south. Go south. Go east. Turn dial to 1. Pull lever.
-Go west. Put gum on stick. Put stick in crack. East. Turn dial to 1. Pull lever.
-Go west. Go north. Go north. Go north. Go north. Go east. Dig in dirt with shovel. Put coal in hole. Go west. Go south. Go south. Go south. Go south. Go east. Pull lever.
-Turn dial to 3. Pull lever.
-Go west. Go north. Go north. Go north. Go north. Go east. Dig in dirt with shovel. Get diamond. Put diamond in setting.
-Go east. Go south. Go south. Go south. Go south. Go east. Pull lever.
-Turn dial to 1. Pull lever.
-Go west. Go north. Go north. Put ring on plinth. Put case on plinth. Go south. Go south. Go east. Pull lever.
-Go west. Go north. Go north. Disrupt case. Get ring. Go south. Go east.