was the title of a long article she contributed to the Encyclopædia Britannica. Her writings on the reality of time culminated in her article Time As Derivative (1907). What Is Meaning? was sympathetically reviewed for The Nation by the founder of American pragmatism, Charles Sanders Peirce, which led to an eight-year correspondence between them, one that has been published three times, most recently as Hardwick (2001). Welby and Peirce were both academic outsiders, and their approaches to language and meaning had some things in common. But most of the correspondence consists of Peirce elaborating his related theory of semiotics. Welby's replies did not conceal that she found Peirce hard to follow, but by circulating copies of some of Peirce's letters to her, she did much to introduce Peirce to British thinkers. Contemporary Peircians have since returned the favour by being sympathetic students of Welby's ideas. C. K. Ogden began corresponding with Welby in 1910, and his subsequent writings were very much influenced by her theories, although he tried to minimise this fact in his best-known book, The Meaning of Meaning (1923). She also corresponded with William James, F. C. S. Schiller, Mary Everest Boole, the Italian pragmatists Giovanni Vailati and Mario Calderoni, Bertrand Russell, J. Cook Wilson and Henri Bergson. Welby's varied activities included founding the Sociological Society of Great Britain and the Decorative Needlework Society, and writing poetry and plays. Significs "...every one of us is in one sense a born explorer: our only choice is what world we will explore, our only doubt whether our exploration will be worth the trouble. [...] And the idlest of us wonders: the stupidest of us stares: the most ignorant of us feels curiosity: while the thief actively explores his neighbour's pocket or breaks into the "world" of his neighbour's house and plate-closet". ("Sense, meaning, and interpretation (I)" Mind N.S. V; 1898) Welby's concern with the problem of meaning included (perhaps especially) the everyday use of language, and she coined the word significs for her approach (replacing her first choice of "sensifics"). She preferred "significs" to semiotics and semantics, because the latter were theory-laden, and because "significs" pointed to her specific area of interest, which other approaches to language had tended to ignore. She distinguished between different kinds of sense, and developed the various relations between them and ethical, aesthetic, pragmatic, and social values. She posited three main kinds of sense: sense,