Elsewhere there seems to be confusion about the samples from "the Newall boulder" and their labels.
" In 1989 the OU team (which included Rob Ixer) examined as many bluestone fragments as they could find, including one that they referred to as RSN18 - ENQ2305. They admitted that they did not know where it had come from, and there was no mention in their text of Newall’s boulder. They renamed it OU2"
Here is a picture of the boulder with a clue for the detective to help in working out the mystery.