In 1903 he reentered Tibet to begin a professional survey although without official sanction, and in the following year Captain Rawling was attached to the
British expedition to Tibet, charged with exploring and surveying the mountainous terrain. During the diplomatic expedition and the campaign which followed it, Rawling surveyed over of
Tibet in addition to his military duties. establishing it as the highest mountain in the Himalayas. and in 1909 was awarded the Murchison Bequest of the Royal Geographical Society in London, of which he was a fellow. He wrote a book about his experiences in Tibet named
The Great Plateau which was published in 1905. In 1909 he was attached to an expedition to Dutch New Guinea, now
Central Papua in Indonesia. During the sea voyage, the expedition's leader was incapacitated and Rawling was called on to replace him. In New Guinea he explored many of the island's untouched jungles and had many encounters with native tribes including the first Western encounter with the
Tapiro pygmies. In much of the terrain his expedition covered, they were the first Europeans ever to reach these regions. The maps and reports from this expedition were the first from this area of New Guinea. His second book,
The Land of the New Guinea Pygmies was released on his return to England in 1913. As recognition for his services he was thanked by the Dutch government, prompted to major in the
British Army and four years later would be presented with the
Patron's Medal of the
Royal Geographical Society. ==First World War==