With a few exceptions, reed organs are not mechanically played
instruments, so they are rarely covered in the Mechanical Music
Digest.  You should check out the Reed Organ Society's web site at
http://sponsor.globalknowledge.nl/ros/  That will lead you to many
other reed organ sites.

My book, "The American Reed Organ and the Harmonium", has an entire
chapter on portable reed organs, including A.L. White.  You can get the
particulars at my web site, http://mmd.foxtail.com/Gellerman/index.htm

Robert F. Gellerman