Crater Lake National Park: Administrative History by Harlan D. Unrau and Stephen Mark, 1987
CHAPTER NINE: Legislation Relating to Crater Lake National Park: 1916-Present
C. ACQUISITION OF MAJOR PARK INHOLDINGS
When Crater Lake National Park came under the administration of the National Park Service there were nearly 2,000 acres of private inholdings in the reservation. The existence of private inholdings in the national parks was viewed by NPS officials as an impediment to effective management. Thus, NPS Director Mather made it a priority of his administration to acquire such inholdings. In terms of Crater Lake National Park the two principal private inholdings to be acquired were the Yawkey and Gladstone tracts.