By the kindness of Captain Carlson, of Clifton, I have been able to make drawings of a pair of celts which came into his possession soon after I had initiated him into the mysteries of prehistoric flint implements. The smaller, and in my opinion undoubtedly the older, of the two, is ground and polished at the cutting-end; and the ground surface becomes narrower as it extends along the middle of each face for the greater part of the length (fig. I).