My dear Köppen,

I return your article herewith. I should already have sent it before but had lost your address in the turmoil of the removal and the mass of business this involved. ^[232]

Marx will have told you how often we thought of you during the sleepless night of exile. I can assure you that you were the only one of the Berliners whom we recalled with pleasure. Come to that, the sleepless night of exile was pleasurable after all and I look back on it longingly from out of this