Visited the Khalifa’s house across fron the Mahdi’s Tomb.  The tomb is the building with the silver domes.  I don’t think this is the real tomb, I believe it is a replica of the original which was blown up by the British, but I digress. 

The Khalifa succeeded the Mahdi and the house contains muskets and a letter from the Mahdi asking “Monkey” Gordon to surrender.  Very historical and interesting.