Geology & Mines.- Behrens (Georg Henning) The natural history of Hartz-Forest, in His Majesty King George's German dominions, first edition in English, printed by W. Pearson, for T. Osborne in Grays-Inn, Holbourn, 1730.

Geology & Mines.- Behrens (Georg Henning) The natural history of Hartz-Forest, in His Majesty King George's German dominions. Being a succinct account of The Caverns, Lakes, Springs, Rivers, Mountains, Rocks, Quarries, Fossiles, Castles, Gardens, the famous Pagan Idol Pustrich or Spit-Fire, first edition in English, 2 advertisement ff. at end, some spotting or foxing, 20th century half morocco, stained, printed by W. Pearson, for T. Osborne in Grays-Inn, Holbourn, 1730.

⁂ First edition in English of Hercynia Curiosa, oder Curiöser Hartz-Wald, 1703, on the geology, mineralogy, speleology, and mines of the Harz mountain region.