蹉跎子 (Cuōtuó Zǐ, “The Stumbling One”), also known as Xīnyáng Cuōtuó Zǐ 新陽蹉跎子, is the pen name used by the author of KR4k0293 Zuìxīn Nǚjiè Guǐyù Jì 最新女界鬼域記 (1909). The fuller form of the pen name identifies the author as from Xīnyáng 新陽, a district in Hunan province. A preface associated with the novel records that the author’s family name was Wú 吳 (or 五 in some transcriptions) and that he came from a distinguished literary family of Jiāngsū. Beyond these traces, the author’s identity has not been established. No CBDB entry is known.