"Report of Pennsylvania Forestry Commission", published in 1896: 1895, pt. 2.

Conservation classic Hawks Aloft chronicles the founding of Hawk Mountain Sanctuary, the world's first refuge for birds of prey. This personal account by the Sanctuary, the world's first refuge for birds of prey. This personal account by the sanctuary's first curator, shares the difficulties and discoveries he and his wife encountered during their first years on the Mountain. Filled with information for the flora, fauna, people, and other natural phenomena of the Hawk Mountain region, this is a lively and sometimes funny account of the sanctuary's early years. Published in co-operation with the Hawk Mountain Sanctuary Association.