Now, from apex to base, the volume of the Great Pyramid in cubic inches is approximately 161,000,000,000. How many human souls, then, have lived on the earth from Adam to the present day? Somewhere between 153,000,000,000 and 171,900,000,000. —Piazzi Smyth, Our Inheritance in the Great Pyramid, London, Isbister, 1880, p. 583
