Thread Sequence and Private Notes

Content

I have been wrestling around with a report and was wondering if anyone out there has any ideas or encountered it before.  I have a report that is simple and totals the amount of incidents created over a time period, pretty straightforward.  What I need is to exclude any incidents that were created in the console where the first entry in the message thread is a Private Note.  I have tried various combinations of the sequence and notes on the thread table but so far no luck.  

Thanks