The fruits of the labor of many volunteers are now available. On April 6, the index to the 1910 - 1955 Missouri Death Certificate was placed on the State Archives website. The earliest records, mostly 1910 - 1920, even have links to a PDF file of the certificate. Of course, all Missouri researchers who has heard the news is swamping the website bigtime. But, I've managed to get some searches in, and I can verify that there will be LOTS of answers - not all answers, but a wonderfully large number.