The Thursford website shows only a few of their many organs.  Same with
their steam collection: the website shows three engines, but the
collection actually has more than fifty.  I have not been able to find
a complete current list of their organ collection.

There is a picture of the Mortier in the collection at:

    http://news.webshots.com/photo/2707988560075034447inOQKI 

and a recently posted YouTube video of it at:

    http://www.youtube.com/watch?v=gliz7LN4TFU
 

Tim Dimock