It wasnot until we had completely re-sorted all our innumerable sheets ofpaper according to subjects, thus bringing together all the facts relatingto each, whatever the trade concerned, or the place or the date—andhad shuffled and reshuffled these sheets according to various tentativehypotheses—that a clear, comprehensive and verifiable theory of theworking and results of Trade Unionism emerged in our minds; tobe embodied, after further researches by way of verification, in ourIndustrial Democracy (1897).