meaning, and significance. In turn, these corresponded to three levels of consciousness, which she called "planetary", "solar", and "cosmic", and explained in terms of a sort of Darwinian theory of evolution. The triadic structure of her thinking was a feature she shared with Peirce. Welby's theories on signification in general were one of a number of approaches to the theory of language that emerged in the late 19th century and anticipated contemporary semantics, semiotics, and semiology. Welby had a direct effect on the Significs group, most of whose members were Dutch, including Gerrit Mannoury and Frederik van Eeden. Hence she indirectly influenced L. E. J. Brouwer, the founder of intuitionistic logic. Bibliography 1852 A Young Traveller's Journal of a Tour in North and South America During the Year 1850 T. Bosworth. 1881. Links and Clues (under the pen name 'Vita'). Macmillan & Co. Second [altered] edition (under the name 'Hon. Lady Welby-Gregory') 1883. 1893. "Meaning and metaphor," Monist 3: 510–525. Reprinted in Welby (1985). 1896. "Sense, meaning, and interpretation I" Mind 5: 24–37. Reprinted in Welby (1985). Extract in M. Warnock, ed., 1996. Women Philosophers. London: Everyman. . 1896. "Sense, meaning, and interpretation II" Mind 5: 186–202. Reprinted in Welby (1985). 1897. Grains of Sense. J. M. Dent & Co. 1901, "Notes on the 'Welby Prize Essay," Mind 10: 188–209. 1903. What Is Meaning? Studies in the Development of Significance. London: Macmillan & Co. 1911. Significs and Language. The Articulate Form of Our Expressive and Interpretative Resources. London: Macmillan & Co. 1929. Echoes of Larger Life. A Selection from the Early Correspondence of Victoria Lady Welby. Edited by her daughter Mrs. Henry Cust. London: Jonathan Cape. 1931. Other Dimensions. A Selection from the Later Correspondence of Victoria Lady Welby. Edited by her daughter Mrs. Henry Cust. With an Introduction by L. P. Jacks, M.A., D.D., LL.D., D.Litt. London: Jonathan Cape. 1983 (1903). What Is Meaning? Studies in the Development of Significance. Reprint of the edition London, 1903, with an Introductory essay by Gerrit Mannoury and a Preface by Achim Eschbach. Foundations of Semiotics, Volume 2. John Benjamins Publishing Company. 1985 (1911). Significs and Language. The Articulate Form of Our Expressive and Interpretative Resources. Reprint of the edition London, 1911, and of two articles by V. Welby. Edited and introduced by H. Walter Schmitz. Foundations of Semiotics, Volume 5. John Benjamins Publishing Company. 2001 (1977). Semiotic and Significs: Correspondence between Charles