Otto Heckman: Friend or Foe?

Some readers might get a false impression of Otto Heckmann from the brief mention of him in Trimble's recent book review in these pages, so I would like to add some more information. I studied physics and astronomy at the University of Hamburg and worked as a student at the Hamburg Observatory, of which Heckmann had been director (long before my time), so while I have no first-hand information, some is second- or third-hand.