An Assumed Inconstancy in the Level of Lake Nicaragua; by C. Willard Hayes, The National Geographic Magazine Vol. 11

An Expedition through the Yukon District - Appendix, The National Geographic Magazine Vol. 04

An Expedition through the Yukon District - Part 1, The National Geographic Magazine Vol. 04

An Expedition through the Yukon District - Part 3, The National Geographic Magazine Vol. 04

An Expedition to Mount St. Elias. Appendix A, The National Geographic Magazine Vol. 03

An Expedition to Mount St. Elias. Introduction, The National Geographic Magazine Vol. 03

An Expedition through the Yukon District - Part 2, The National Geographic Magazine Vol. 04

An Expedition through the Yukon District - Part 4, The National Geographic Magazine Vol. 04

An Expedition to Mount St. Elias. Appendix C, The National Geographic Magazine Vol. 03

An Expedition to Mount St. Elias. Glaciers, The National Geographic Magazine Vol. 03

An Expedition to Mount St. Elias. Appendix D, The National Geographic Magazine Vol. 03

An Expedition to Mount St. Elias. Height and Position, The National Geographic Magazine Vol. 03

An Expedition to Mount St. Elias. Narrative of the expedition of 1890. Part 1, The National Geographic Magazine Vol. 03

An Expedition to Mount St. Elias. Narrative of the expedition of 1890. Part 3, The National Geographic Magazine Vol. 03

An Expedition to Mount St. Elias. Narrative of the expedition of 1890. Part 2, The National Geographic Magazine Vol. 03

An Expedition to Mount St. Elias. Narrative of the expedition of 1890. Part 4, The National Geographic Magazine Vol. 03

An Expedition to Mount St. Elias. Narrative of the expedition of 1890. Part 6, The National Geographic Magazine Vol. 03

An Expedition to Mount St. Elias. Narrative of the expedition of 1890. Part 5, The National Geographic Magazine Vol. 03

An Expedition to Mount St. Elias. Narrative of the expedition of 1890. Part 7, The National Geographic Magazine Vol. 03

An Expedition to Mount St. Elias. Previous explorations, The National Geographic Magazine Vol. 03