The late U.K. archaeologist Mick Aston was one of the first scientists to take note of the Gulval Stone. With the help of several colleagues, he initiated research on the monument, but died in 2013 before that could be completed.
Goskar, who pioneered the use of 3D laser scanning to study lost rock art, such as on Stonehenge, took up where the other researchers had left off. One evening, he and friend Nick Ford had a "eureka" moment. While analyzing 3D data that Goskar had compiled, they noticed a pattern: each of the monument's sides featured a different saint with the head of animals mentioned in the Biblical passage Ezekiel 10:14 and in Revelations:
"Also in front of the throne there was what looked like a sea of glass, clear as crystal. In the center, around the throne, were four living creatures and they were covered with eyes, in front and in back. The first living creature was like a lion, the second was like an ox, the third had a face like a man, the fourth was like a flying eagle."
St. Matthew, as previously shown, was the "man," likely since his Gospel focuses on Christ's incarnation and humanity, Goskar said. Here, however, is St. Mark, from the stone's west-facing side, as revealed by the laser scanning.
"He is shown kneeling, which a haloed lion head," Goskar explained. "His book, held in his left hand, has 'M' (for Marcus) on it. He is giving the sign of benediction with his right hand. The folds of his robes are nicely visible."
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