Capitan described the Red Crag as a sandy clay, colored red by oxides of iron, containing isolated siliceous stones, phosphate concretions of round small size, fragments of shells, rare shark teeth and even more rare whale bones, and also relatively small pieces of fractured flint. These elements, he noted, were concentrated in a layer at the base of the Crag. Capitan stated: “This is the detritus bed. It is here exclusively (except at Foxhall where there is a second bed almost the same as this) that one finds, only after great trouble, isolated in the midst of the sands, and never in contact with other flints, some flakes and pieces of broken flint, and even more rarely the typical Red Crag specimens” (Lohest
Members of the commission carried out four excavations into the detritus bed over the course of four days and found five or six typical specimens. Capitan stated: “I will not neglect to say that the flints were absolutely in place in compact terrain; two reposed at Thorington Hall on the underlying clay. . . . at Thorington Hall you have a detritus bed covered by marine sands. So everything there is from either before or contemporaneous with the sea that deposited the Crag” (Lohest
Studying the specimens of Moir and those at the Ipswich Museum, Capitan categorized them as doubtful, probable, and definite. About half the total specimens were in the doubtful category, with almost another half in the probable category. In the probable group were all those flakes that showed traces of adaptation or retouching identical to that on accepted tools. Capitan stated: “We consider that the greatest number of these pieces are genuine tools bearing diverse traces of intentional work which one can distinguish, with practice, from natural fracturing and flaking. But if someone wants to express doubts, then we leave the discussion to them and will not seek to demonstrate the intentional work” (Lohest
But Capitan stated that in addition to the many specimens in the probable category the commission recognized twenty pieces as indisputably worked: “They are of definite form, exactly like accepted Mousterian pieces. These are not freaks of nature or naturally broken stones used without modification as tools—they were products of volition, and show signs of a definite intent to construct a particular kind of tool” (Lohest
Capitan, praising the rigorous scientific procedures applied by Moir and his collaborators, then stated: “One might object that the small number of definite specimens is not sufficient, but this is due to the extremely rigorous process of selection. We are persuaded that a great many of the ones not selected are also worked” (Lohest
Capitan concluded: “We need not uselessly continue the discussion about whether these pieces are worked or not, giving undue attention to explanations from incompetents. For any person who has any real acquaintance with the characteristics of worked flints, such questions will not come up” (Lohest
Figure 3.11. A side scraper (racloir) discovered beneath the Red Crag at Thorington Hall, England (Lohest et al. 1923, p. 63).
Capitan next described some of the undisputed specimens. These came from Thorington Hall, Bramford, and the Bolton Company brickfield. From Moir’s reports (1924), it appears that the primary tool-bearing layer at each of these sites is the detritus bed below the Red Crag. This would make the flint tools Capitan described at least 2.5 million years old. And because the detritus bed contains materials from ancient Eocene land surfaces, the tools might be up to 55 million years old.