July 28 1921 Thursday. Boston, Mass. Packed up my box of brachs, and Raymond will ship it by express, Tried out my ideas about the Brehmin succession with Raymond. He has studied the trilobites and I now dare see the brachs, There is no Lower Cambrian The Middle Cambrian in the regulation me of the Atlantic province th'p the species are different south of the Pontiac barrier than to the north of it. There is no Upper Cambrian. There is no Ordovician. For D, I saw our brachs, but Raymond has trilobites and there he says are clear of the Brehmin. This seemingly means that some of the Canadian or Bedd mantum is present. See in Mr Shaggian