Excerpt: "Six years have passed since the grave at Renthendorf closed over the remains of my esteemed father, whose death—all too early—was as great a loss to Science as to those who loved and honoured him. It was strange that his eventful and adventurous life, in the course of which he visited and explored four quarters of the globe, should have ended at the little spot in green Thuringia where he was born. He had just reached his fifty-fifth year when his lips, so apt in speech, were silenced, and the pen which he held so masterfully dropped from his hand. He was full of great plans as to various works, and it is much to be regretted that the notes which he had collected towards the realization of these were too fragmentary for anyone but their author to utilize. But the manuscripts which he left contained many a treasure, and it seemed to me a duty, both to the author and to all friends of thoughtful observation, to make these available to the reading public."
