Each one of these, represent a previous Mwata and the clan he came from. There is supposed to be 18 representatives, but there are always some that are missing due to illness, or transportation problems.
Then they all enter into the sacred area and sit in front of the Mwata. Then one by one they come up to the Mwata holding a vessel of some sort filled with mpemba, from which he opens and takes a pinch of the white clay and smear it on his forehead and then on both of the upperside of his arms. This signifies that the Ancestors (the previous Mwatas) are blessing him for the coming year. Also the representative smears it in the same places on them. Then before the vessel is closed, the Mwata places some money in the vessel and closes the top. This is like the Mwata is giving tribute to his ancestors so they will not be offended.
This observance occurs right after the Nakabutula shrine. Where the Mwata proceeds to one of the Myambo trees. But before he reaches the site which is located right outside the back entrance of the Palace, he stops and crawls on all fours for a few meters with his aid to show respect to his ancestors. As you get closer to the Myambo tree, you will notice a group of people dressed in white attire holding a container filled with Mpemba standing in front of the entrance way into the sacred place protected by a thick branch fence.
Where: Behind the palace next to the myambo trees
When: 10:30am to 11:00am
Why: To give respect to the ancestrors