Luna Bergere Leopold Papers contain a truly remarkable set of field notes and journals traversing some 75 years (1931-2006). The son of the famous conservationist Aldo Leopold, Luna Loeopold enjoyed a long and multidisciplinary career in his own right, contributing to the fields of meteorology, hydrology, geomorphology, and conservation more broadly. The APS holds two sets of materials that provide rich, nearly daily insights into his long career: Leopold's field notebooks and personal journals. Maintained in 71 numbered volumes—101 volumes total—the field notebooks begin in 1937 and end in 2006, just a day before his death. Given the volume of material, researchers would be well-advised to us the two indices, hand-bound by Leopold, to navigate these volumes. (Thankfully, the APS finding aid is also unusually granular.) In addition to detailed field measurements, readings, and professional travels, Leopold often uses these notebooks to record personal reflections. Arguably the jewel of the collection, however, is a set of 12 large, meticulously illustrated personal journals that collect decades (1931-2003) of personal stories, work perspectives, and travelogues. These journals are so packed with photographs, illustrations (many of them quite remarkable in their draftsmanship), and other ephemera that they might be better described as ornate scrapbooks, and some items have been relocated into separate folders. Scholars new to the collection may choose to begin research with the field notebooks and personal journals by tracing Leopold's wide-ranging twentieth-century travels. In addition to decades of intensive field work in the American west, Leopold spent extensive time in Hawaii prior to statehood (1947-48), visited India shortly after Independence (1955), and conducted a 1970 worldwide trip that carried him to Kenya, Nepal, Japan, and Israel (to which he would return in 1974 and 1983).