H. R. Hall, History of Egypt, Chaldea, Syria…
“ Further, it is covered almost to the ground by the original casing of polished white limestone blocks, so that it gives a very good idea of the original appearance of the other pyramids, which have lost their casing. These two pyramids very probably belong to kings of the Hid Dynasty, as does the Step-Pyramid of Sakkâra. They strongly resemble the Gîza type, and the northernmost of the two looks very like an understudy of the Great Pyramid. It seems to mark the step in the development of the royal pyramid which was immediately followed by the Great Pyramid. ”
