Hawaii (1907-1920)

Initially Rock taught Latin and natural history at Mills College (now known as Mid-Pacific Institute). With little formal background in the latter subject, he quickly trained himself as a botanist and became the leading authority on Hawaiian flora. Despite his lack of credentials, in 1908 he talked himself into a job to develop the first herbarium in Hawaii for the U.S. Department of Agriculture, collecting enormous numbers of plants from his explorations around the islands. In 1911, the herbarium was transferred to the College of Hawaii (later the University of Hawaii) with Rock as its first curator and the Territory of Hawaii's first official botanist. During his time in Hawaii, Rock produced dozens of scholarly articles and five books, among which Indigenous Trees of the Hawaiian Islands (1913), in particular, is considered a classic work in its field. In 1913 Rock was part of a small expedition to the remote Palmyra Atoll, which resulted in the publication of a comprehensive description of its flora.^[2]

Botanical Expeditions in China (1920-1933)

In 1920 Rock left Hawaii for what would prove to be decades of residence and expeditions in Asia, mostly in Western China. The U.S. Department of Agriculture employed him as an agricultural explorer, sending him to Southeast Asia in search of seeds of the Chaulamoogra tree (Hydnocarpus wightianus), which was used in the treatment of leprosy. This success led to further expeditions in southwest China, and in 1922 Rock first arrived in Lijiang in the northwest of Yunnan province, the center of the Nakhi (Naxi) people. The valley of Lijiang is dominated by the Yulong range, at whose foot Rock established a residence in the village of Nguluko. This would be his primary base for the next 27 years, as he organized botanical expeditions throughout much of western China along the eastern borderlands of Tibet, a large, remote and very rugged area with numerous non-Han peoples for the most part only nominally governed by the Chinese government. Throughout the period Rock was in China, the country was wracked by warlordism, civil war, the war with Japan and finally the triumph of Mao Zedong's communist forces. Western China was parceled out into a colorful array of petty states and tribal territories, and infested with banditry, a well established way of life throughout these areas.

Nevertheless, Rock managed to collect and send back to his sponsors in the U.S. large quantities of plant and bird specimens, as well as many thousands of photographs of geographical, botanical, ethnographic and historical interest. Working with a group of Nakhi assistants, many of whom remained with him for decades, Rock was a superb collector, both in the quantity and quality of his seed and plant specimens. Since he came relatively late in terms of botanical exploration to one of the most bio-diverse regions of the world, he discovered relatively few new plant species, but many superior specimens to what had previously been available in the West.^[3] His style of expeditions typically involved large caravans, which besides the necessary provisions and equipment for storing his specimens and photography, included a personal cook, table with complete dinner setting, a portable bathtub and a phonograph. Usually an armed escort was a necessary addition against bandits or hostile tribes and had to be arranged for with each local authority. These expeditions were carried out over the course of the 1920s, financed by various prestigious institutions.

For the first few years based in Lijiang, Rock carried out expeditions mostly in the northern regions of Yunnan sponsored by the National Geographic Society and the Smithsonian Institution. Beginning in Dec. 1924, Rock set off on his most ambitious expedition lasting over three years sponsored by Harvard's Arnold Arboretum. The primary purpose was to collect plant and bird specimens in Gansu province, around Kokonor (Qinghai Lake) and in the Amnye Machen mountain range. For much of this time he based himself in Choni (Jonê County), Gansu as the guest of the prince or chieftain (tusi) of this small Tibetan kingdom, and his explorations included visits to the great Kumbum, Labrang and Rakya Tibetan monasteries. The entire region was wracked by warlordism and ferocious Tibetan-Muslim conflicts. Rock witnessed some of the brutal consequences of the Golok rebellions when the Warlord general Ma Qi's Chinese Muslim army campaigned against the fiercely independent nomadic Goloks and ravaged the Labrang Monastery.^[4] Rock finally left Choni in March 1927, but not before acquiring from Choni's famous printing press complete sets of the Kanjur and Tanjur canon of Tibetan Buddhist scriptures, 317 volumes in total, printed from 18th century wood blocks considered among the very finest quality. The following year Choni was sacked, the monastery and its ancient press burnt to the ground in the Muslim conflict in Gansu (1927–1930) by a Muslim army. This was the most important of a number of significant Tibetan texts Rock acquired for the Library of Congress collection.^[5]

When the Arnold Arboretum declined to finance a return expedition, Rock found sponsorship from the National Geographic Society to make a number of trips to southwest Sichuan to explore both the Konkaling range and Minya Konka (Mount Gongga). The latter is among the highest mountains outside of the Himalayas and was particularly difficult of access, not least because of the purported hostility of the local tribes. Rock approached closer to Minya Konka than any other Westerner and with characteristic romantic exaggeration declared it to be higher than Everest, although at the time he was not alone in this wishful miscalculation. During these explorations, Rock based himself in the lama kingdom of Muli, which he had first visited in 1924. Another small kingdom that he often visited, also in southwest Sichuan, was Yongning on the beautiful Lugu Lake, center of the Mosuo people. These explorations produced a series of articles for the National Geographic magazine, although the editors were hard pressed to reshape them, much to his annoyance, for their more popular readership and to off-set Rock's propensity for accumulative detail over coherent presentation. Nonetheless, he published a significant number of articles on little known areas and exotic peoples and customs of Western China accompanied by his excellent photographs.^[6]

Studies of the Nakhi

Rock with the Prince of Choni in Gansu, 1925

Despite the scale of his botanical collecting, for which he primarily received his funding, Rock published nothing on the flora of China (although later he did work on a large phytogeographical study, partially published posthumously^[7]). By the end of the 1920s, his attention turned decisively to the culture of the Nakhi people. He wrote a two volume cultural history of the Nakhi and many studies of the texts and ritual ceremonies of the Dongba, a term that refers to both the religious texts and the shaman priests who composed them. The Nakhi Dongba were prolific composers of recitation texts using a unique script typically described as pictographic, although it is better understood as a rebus-like mnemonic device that complexly combines iconic and phonetic elements. The script required intensive training to be read or interpreted, and therefore was strictly for religious purposes and largely comprehensible only by the Dongba themselves.^[8] Rock worked with a number of dongba priests to produce transcriptions and detailed readings of the most important ceremonial texts, as well as a dictionary-encyclopedia.^[9] While not the first to study the dongba script and rituals, his work is still considered the foundation of subsequent scholarship. He also collected numerous manuscripts or "books" and is responsible for the large majority (over 7,000) of the Nakhi works that exist outside of China, a third of all surviving Nakhi texts, huge numbers of which were destroyed particularly during the Cultural Revolution.^[10]

With onset of World War II, Japanese aggression forced the Nationalist government of China to retreat to the far interior and Yunnan became a central supply point. During the war years, Rock was in and out of Lijiang, often undecided whether to stay and continue his Nakhi research or to leave. He spent a year in southern Vietnam, which gave him a relatively stable circumstance for writing until further Japanese advances forced him out. In 1944 the U.S. Army Map Service employed him for his geographic expertise on the Yunnan section of the exceptionally hazardous route designated "The Hump," over which the Allies flew in supplies from India to Chiang Kai-shek's forces in western China. Rock shipped his manuscripts prepared for publication and much of his collection to safety in Europe, but all were lost when the ship was torpedoed in the Arabian Sea.^[11] Fortunately the Harvard-Yenching Institute offered him support to return to Lijiang and reconstruct his work on the Nakhi. Working furiously despite serious medical problems, he was able to recreate and augment his lost work. However, in the aftermath of the defeat of Japan, communist forces soon took control of Lijiang (which had not been reached by the Japanese), making life increasingly difficult for the few foreigners residing there, and Rock left with his collections and manuscripts for the last time in August 1949.

Last Years (1949-1962)

Initially he based himself in Kalimpong, India hoping the situation would settle down and allow him to return to Lijiang. Once he realized that China was closed to him for good, he characteristically spent his last years wandering between Europe, the U.S. and Hawaii, often selling his considerable personal library and collections to support himself and to see his work into print. Finally settling in Honolulu, he continued his extensive Nakhi researches and renewed his enthusiasm for Hawaiian flora. He completed his monumental A Nakhi-English Dictionary Encyclopedia, both a dictionary of the Dongba script and an encyclopedia of Nakhi culture, and arranged for its publication in the year of his death in 1962. He died in Honolulu where he is buried.