was somewhat further south, or more distant from the sea than now, the brick in question might be comparatively very modern. It is agreed by the best geologists that the age of the Nile mud cannot be accurately, but only approximately calculated by the data thus far furnished. The amount of matter thrown down by the waters in different parts of the plain varies so much that to strike an average with any approach to accuracy must be most difficult. The nearest approach, perhaps, as has been observed by Baldwin, to obtaining an accurate chronometric scale for ascertaining the age of the deposits of the Nile at a given point, was made near Memphis, at the statue of King Rameses. It is known that this statue was erected about the year 1260 B. C. In 1854 it had stood there 3,114 years. During that time the alluvium had collected to the depth of nine feet and four inches above its base, which was at the rate of about three and a half inches in each century. Mr. Horner found the alluvium, below the base of the statue, to be thirty feet deep, and pottery was found within four inches of the bottom of the alluvium. If the rate of accumulation previous to the building of the statue had been the same as subsequently, the formation of the alluvium began, at that point, about 11,660 years before the Christian era, and men lived there some 12,360 years ago, cultivating the then thin soil of the valley. But it would appear to be certain that the average deposit is so slight annually that many centuries more than those formerly quite universally received as the age of the world for the stage of mankind’s achievements must have passed since the work of man’s hands have been buried under these vast deposits of alluvium. Thus, geology insists, is the fact of man’s existence, long before the historic era, conclusively established. [Illustration: AN OBJECT OF INTENSE INTEREST.]