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The Bat Creek Patina

by Dr. J. Huston McCulloch,
Professor of Economics and Finance
The Ohio State University, Columbus OH

About Dr. J. Huston McCulloch

Gus Van Beek, Curator of Old World Archaeology at the Smithsomian Institution, was quoted in Science Digest (Jan. 1972, pp. 43-53) to the effect that two modern scratches on the Bat Creek stone appeared to him to have the same patina as the rest of the inscription. He concluded that the original inscription must therefore also be modern, and could not date to the 1st or 2nd century A.D., as claimed by Cyrus Gordon.

The two vertical strokes on the face of the tablet are indeed modern, and were added by an unknown party sometime between 1894 and 1970, as I showed in my recent article in the Tennessee Anthropologist (Fall 1988, p. 96). I concluded in that article (p. 108) that Van Beek must have been mistaken, on the grounds that the new radiocarbon date on wood fragments found with the tablet date the burial to the period 32 A.D. - 769 A.D.

A Devil's Advocate could nevertheless argue that perhaps the agent who found the stone (John Emmert) merely planted an inscription that he himself or a confederate concocted, along with some 18th century brass bracelets, in an otherwise genuine and ancient mound burial that really contained the wood fragments. Despite the implausibility of this on several grounds (ibid., 112-115), every angle on such an unusual artifact deserves to be investigated thoroughly. On a recent visit to Washington, I therefore reexamined the stone to see if Van Beek's assertion about the patina was correct.

On examination with the naked eye and with a magnifying glass, there were no obvious differences between the vertical strokes and the original inscription. In particular, they were of roughly the same brightness in contrast with the dark surface of the stone, and therefore seemed to be about as fresh.

Under a low-power microscope, however, the two groups of marks looked very different. To understand these differences, it should be recalled that the stone itself is light-tan colored, but is coated on the inscribed face and edges with a thin dark brown crust. According to a tag from the USNM Dept. of Paleontology that accompanies the stone, the stone is an iron-rich siltstone, and the crust is an iron oxide. The tag does not indicate which oxide of iron this is, but it would appear to be either goethite or hematite, chemically similar dark minerals with red to orange streaks. The original letters are, for the most part, cut entirely through the crust into the light siltstone beneath, making the letters the letters stand out very brightly against the dark face of the stone, even without special lighting. In a few places (notably the heads of the letters I identify in my article as ii and vi), the crust was either thicker or the scribe lost patience, and the letters do not penetrate the crust. In these places the original letters are very hard to read without oblique lighting, and indeed Gordon actually misread the shape of letter ii as a result.

Under the microscope, it became clear that the two vertical strokes do not penetrate the dark crust, and are bright only because they are the red-orange color of freshly pulverized iron oxide. In the original characters, on the other hand, the red-orange coloration that must have been originally present along the edges of the grooves and in the heads of letters ii and vi, has entirely reconsolidated in the dark brown finish as the rest of the encrusted face. If the new strokes had patinated under the same wet conditions as the stone, and for as many centuries, they would be as difficult to see without oblique lighting as are the non-penetrating heads of ii and vi. The relevant comparison for brightness is therefore between the new strokes and the heads of ii and vi, not between the new strokes and the rest of the letters.

The siltstone bottoms of the grooves in the letters that penetrate the crust have traces of beaded dark brown oxide on them, which must have reconsolidated since the letters were made. One letter actually has a tiny concretion it int, evidently a speck of silica or other foreign matter that had became fused into the groove by the iron oxide dust as it reconsolidated. This concretion (near the base of letter vi) is on top of the strokes that made the letter.

In his report, Emmert indicated that he struck the stone, but only on its back side, with a steel probe before he actually dug down to it, and indeed there is a gash in the siltstone of the backside. This gash looks much fresher under the microscope than do the bottoms of the penetrating grooves.

I would not venture to say just how old the patina on the original characters is, but it certainly gives the impression of great antiquity in comparison with the two modern strokes. Van Beek was clearly stong to claim that the patina itself indicates the Bat Creek inscription is modern.

In my article, for which I relied on Lidzbarski's defective 1902 drawing of the Siloam inscription, I had erroneously indicated that the distinctive Bat Creek word divider was unknown in the Old World before the 20th century discovery of the Qumran manuscripts. In recent correspondence with Frank Cross (letter dated July 3, 1989, pp. 9-11), I show that although the word divider used in the inscription was indeed used in the Siloam inscription, it was still unknown before the discovery of that inscription to Jerusalem in 1880. The word divider therefore rules out the possibility that an 18th century or early 19th century prankster placed the stone in the mound. Furthermore, the state of vegetation on the mound when Emmert excavated it in 1889 rules the possibility that anyone placed the stone in the mound between 1880 and 1889. Therefore the stone, if a forgery, must have been introduced by Emmert as he dug, and so was never in the mound to patinate at all. The fact that it is, in fact, well patinated, therefore rules out all reasonable possibility of forgery.

Postscript

Since the above was written, an extensive critique of my TA article, by Robert Mainfort and Mary Kwas, appeared in TA, 1991 (1), as has my reply to M&K, 1993 (1). Copies are available from the Tenn. Anthropology, Univ. of Tenn., Knoxville TN 37996-0720. An additional article on the Bat Creek stone, by myself with an excellent photo by Warren Dexter, appeared in the July/August 1993 issue of Biblical Archaeology Review (3000 Connecticut Ave., N.W., Suite 300, Washington DC 20008).

Web Master Note: The above color photo of the Bat Creek Stone is from Dr. McCulloch's outliner home page and replaces the original MES Journal black and white photo.