Site II was mistakenly identified as a late Neolithic site when it was first excavated, and Mary Leakey assigned it to the Neolithic "Gumban B" culture which Louis Leakey had identified from earlier excavations in the area. Few Iron-Age sites had been excavated in the area, and there was no reliable way for Mary Leakey to date the site. Few iron artifacts have ever been found at Site II, which further confused the actual date. Scattered obsidian flakes similar to those used by earlier cultures were also found at the site. It is unknown whether these were made by the inhabitants of Site II, or the earlier inhabitants of Site I.[19].[18]