Better unknown as Margaretha Geertruida Zelle Van der Meulen, Mata Hari's realme, this meant pearl(/daisy flower)+spear of strength+{Zelle}+From the mill... Or so I presume... For "Meulen" as as "Mill" is just a guess from doing some few similar querries on google for Van der Meulen. But the only clue I got to Zelle was that in some language that's the word used for February, it didn't shed light on its meaning and lack any specification so that's why I leave for the abled... (I'm surprised to see me again in the surname boards... I had a hard time finding my way back).