Sep.-27-1900 Arrived at Cumberland last night and came stopping with Mr. R. H. Sorden. Spent the day at the Devils Back Cone section. We first collected back of the R.R. match box and I soon learned that most of the lower roll here up the hill side has fallen down from the cliff to the right (or east). In this debris I found several large and typical Pentamerus and then from picking the eastern 1 Sep. section, Selective sorting began a doubt that the limestone ridges below (east) are all of the Lower Pentamerus. Going up the hill near the top about two feet of the limestone (higher or section) we saw on the face came several Orthos Matu. Spinifer macrophluma, L. rhomboidalis Strephonella punctulifera and Orthotheca amphorhana n.gadiota. This assemblage points unmistakably to the Delthyra (one to fifth page.)