—Elijah died on October 10th 1929 due to senile dementia. He spent his last year in the Eloise infirmary in Michigan (poorhouse). 
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— http://www.railfame.ca/sec_nohttp://inventors.about.com/od/mstartinventors/a/ Elijah_McCoy.htmm/en_nomineesdetail.asp?id=286&ssec=