Perhaps, some of this can help:

Probate records in St. Louis, MO mentions Col David Bayles regarding part of his probate records in St. Louis, MO--He was dead by 3/1863 according to court records--3 heirs, Louis M, Emma W. & Ellen Bayles (his children)..He was listed on the 1860 St. Louis, MO census as "hrf" posted earlier to you...

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Main website to view all the David Bayles probate files in St. Louis..Click on "View Images" to see his complete file..Probate piece that lists the name Col David Bayles is file collection No 25:

Missouri's Judicial Records

http://www.sos.mo.gov/archives/mojudicial/results.asp?PartyName=bayles&radSearch=BEG&Year=&YearEnd=&hSearch=name&selCounty=000

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Gay