 Public mentions of Cope 's passing were relatively slight . The Naturalist ran four photographs , a six @-@ page obituary by editor J. S. Kingsley , and a two @-@ page remembrance by Frazer . The National Academy of Sciences ' official memoir was submitted years later and written by Osborn . The American Journal of Science devoted six paragraphs to Cope 's passing , and incorrectly gave his age as 46 . Cope was survived by his rival Marsh , who was suffering poor health . 
