Be me
Be on Honor Mode
Mess around with the 2 Teleport Pyramids I have
Get to the Lumbermill
Wonder if I can cross the river
Get stuck
Somehow get back to the mill
Can't retrieve my Teleport Pyramid
What?
Try to get the other one back
Start to worry
Stand around like an idiot cursing myself and screaming internally
Make topic on Reddit
Apparently there is a Yellow Pyramid that might help

When I find it, I'll see if that works.