I thought it might be an early UF type of cable, but it was used in the walls of this old house. Don't believe that they would use this much of it ( half of the house was wired in it ) in the house; especially if it was made for underground. The other half of the house cloth covering, so I know that the lead covered wire was not the only type available.
Also, does it not seem strange to ya'll that they are using a conductive covering to protect two insulated electrical wires. Looks like a hazard just waiting to happen.