Paul Eugène Pelliot
French sinologist and linguist Paul Pelliot (1878-1945) came across the oldest written account on Angkor, The Customs of Cambodia by Chinese diplomat Zhou Daguan, while he was researching the travelogues of famous explorer Marco Polo and the collection of Dunhuang manuscripts. He authored the most reliable French translation of Zhou's journal in 1902.
Pelliot became otherwise a reference in Chinese, Mongolian, Persian, Uigur and Central Asian studies, holding the Chair of the Languages, History, and Archaeology of Central Asia which the Collège de France established especially for him.
For an online bibliography related to this author, see here.