As said in the post.
I was typing in my notes file at the time of the crash (note tied to Bible reference).
The logs don't record the crash (although the Error log shows a number of errors prior to the crash). Please note that the time stamp for the last error in the Logos.log is about an hour before the crash (at about 8:20am).
7624.Logos.log
7367.LogosError.log
EDIT: Reopening Logos and typing in the same note file entry did not crash the program. A fluke?