Does the Goulston Street Graffito eliminate Jewish Immigrants as suspects?

[Mark J D]

was it possible to even see what you were writing with white chalk in that stairwell at 2:30 am, or so[?]

Well, thank goodness that, in the finished result, there was nothing ambiguous about what letters were written or what the words were meant to be. You know, the kind of thing that would have meant different coppers saw different letters, and none of the combinations made real words. That would have caused so much confusion...

M.