The purposes of this study are to: 1) describe the phonological system of . 2) describe the morphophonological rules of , and 3) review the spelling methods that used by Homer B. Hulbert (1863~1949) who wrote . The results of this study showed that the phonological system of was the same with one of Korean in the 19th century, and that the morphophonological rules of were almost the same with those of Korean in the 19th century. Also, this study found that Hulbert used conservative spelling methods in , mainly employed morphemic spelling rather than phonetic spelling, and perceived Korean as a phonemic character.