Thanks to Jack Jacobs we have now found out that two photos in the book 'The Mortier Story' have been swapped:
- The photo at the top of p.246 is not Mortier #1051 but it's the same instrument as pictured at the bottom of p.249 (rebuilt in Germany by Brevet & Bruder); so this photo belongs at the op of p.249.
- The photo at the top of p.249, however, does show Mortier #1051 (which would later become the 'Mon Rêve', owned by Lambert Jamers): so this photo should have been published at the top of p.246.