Ishango Bone
The Ishango bone is also another bone which is often confused with the Lebombo bone. It is sometimes called a tally stick. The Ishango bone was found covered in layers of Volcanic ashes on the shores of Lake Edward in the Ishango region in the Democratic Republic of Congo. It was also made from the fibula of Baboons though it was discovered to be 20,000 years old, relatively younger than Lebombo. The bone has a sharp piece of quartz affixed to one end thought to be used for engraving and marking during counting.