"Early in the 15th century a western priest in Tibet, named Halima (...), was summoned to Peking, and honoured by the Emperor Yung-loh." E.H. Parker, The Preaching of the Gospel in Tibet, The China Review, vol. 18, no. 5 (March 1890), pp. 279-284, at p. 279.
Hugh Richardson, Halima, an entry in The Ming Biographies (New York 1966/70).
Suo Wenqing, Halima's Entering the Capital in the Early Ming Dynasty and the Making of the Map of Auspices, A paper given at the Beijing Seminar on Tibetan Society, China Tibetology Research Center (Beijing, October 13-17, 2008).