Sorry to leave you in the lurch concerning the progress of my outhouse. I finished the hole after about 12 hours of digging, spaced over a couple weeks. At that point I hit bedrock and decided the pit was deep enough at four and a half feet. It is about three and a half feet in diameter. I lined it with chicken wire, more for peace of mind than for any functional reason. The last time I climbed into the hole there were two frogs and two mice at the bottom, trapped like Joseph. I assisted them to freedom. Now, to move the outhouse itself.
Nothing like a new and unsullied outhouse hole