NOT PITMAN, apparently
I sent the page of shorthand to the person recommended to Lutz by Dresden museum, and she was kind enough to examine it for me. Here's her reply:
"... I wondered whether it was Pitman's Centenary and contacted a more knowledgeable source:
'With regards to the attached shorthand - it is not Pitman (as there is a thickened stroke written upwards that looks like an "L"). Pitman from the outset realised that it would be difficult to write thick strokes upwards - so eliminated it - therefore this is not Pitman. It could be something like Sloan-Diployan - but not sure.'"
Hmmm - what next? IAN