Book excerpt: Cognitive linguists have proposed that metaphor is not just a matter of language but of thought, and that metaphorical thought displays a high degree of conventionalization. In order to produce converging evidence for this theory of metaphor, a wide range of data is currently being studied with a large array of methods and techniques. Finding Metaphor in Grammar and Usage aims to map the field of this development in theory and research from a methodological perspective. It raises the question when exactly evidence for metaphor in language and thought can be said to count as converging. It also goes into the various stages of producing such evidence (conceptualization, operationalization, data collection and analysis, and interpretation). The book offers systematic discussion of eight distinct areas of metaphor research that emerge as a result of approaching metaphor as part of grammar or usage, language or thought, and symbolic structure or cognitive process.