This is a three-volume collection of calligraphic transcriptions of famous writings from Korea and China written by Yi In-sang (1710-1760, pen-name: Neunghogwan) in the seal and plain square styles of calligraphy. It contains the largest number of works among the existing calligraphy albums of Yi In-sang and is highly significant for exerting a profound influence on the development of calligraphy among subsequent generations.