Robbie,  The details of the final roll in this series are

  QRS 80186  Magnolia Suite
    5.  The Place Where The Rainbow Ends

All four rolls were listed in the QRS Autograph monthly bulletin for
October, 1912.  This was included in the QRS Autograph rollography
I published privately a few years ago, and which Bob & Ginny Billings
will be including in their excellent QRS rollography series.

Unfortunately, I don't have any of the rolls!

Cheers,
Rob DeLand

 [ Thanks for the data, Rob.  This is the roll we seek.  -- Robbie