But our intercourse with Nature had been limited to formal visits which we were permitted to pay the august lady at stated intervals.

In Keilhau she became a familiar friend, and we therefore were soon initiated into many of her secrets; for none seemed to be withheld from our Middendorf and Barop, whom duty and inclination alike prompted to sharpen our ears also for her language.
The Keilhau games and walks usually led up the mountains or into the forest, and here the older pupils acted as teachers, but not in any pedagogical way.

Their own interest in whatever was worthy of note in Nature was so keen that they could not help pointing it out to their less experienced companions.
On our "picnics" from Berlin we had taken dainty mugs in order to drink from the wells; now we learned to seek and find the springs themselves, and how delicious the crystal fluid tastes from the hollow of the hand, Diogenes's drinking-cup! Old Councillor Wellmer, in the Crede House, in Berlin, a zealous entomologist, owned a large collection of beetles, and had carefully impaled his pets on long slender pins in neat boxes, which filled numerous glass cases.

They lacked nothing but life.

In Keilhau we found every variety of insect in central Germany, on the bushes and in the moss, the turf, the bark of trees, or on the flowers and blades of grass, and they were alive and allowed us to watch them.