Origin of Hangul
Ledyard holds that the Koreans adopted five core consonant letters from ’Phags-pa, namely ㄱ "g" , ㄷ "d" , ㅂ "b" , ㅈ "j" , and ㄹ "l" . These were the consonants basic to Chinese phonology, rather than the graphically simplest letters (ㄱ "g" , ㄴ "n" , ㅁ "m" , and ㅅ "s" ) taken as the starting point by the "Haerye." A sixth letter, the null initial ㅇ, was invented by Sejong. The rest of the consonants were developed through featural derivation from these six, essentially as described in the "Haerye"; a resemblance to speech organs was an additional motivating factor in selecting the shapes of both the basic letters and their derivatives.
Sangoku Tsūran Zusetsu
A copy of "Sangoku Tsūran Zusetsu" was brought to Europe by Isaac Titsingh (1745-1812). In Paris, the text represented the first appearance of Korean han'gŭl in Europe. After Titsingh's death, the printed original and Titsingh's translation were purchased by Jean-Pierre Abel-Rémusat (1788-1832) at the Collège de France. After Rémusat's death, Julius Klaproth (1783-1835) at the "Institut Royal" in Paris published his version of Titsingh's work. In 1832, the Oriental Translation Fund of Great Britain and Ireland supported the posthumous abridged publication of Titsingh's French translation.