The economist Galenson (2005) proposed a theory of creative life cycles that distinguishes between early-peaking conceptual creators (finders) and late-peaking experimental creators (seekers). This contrast is claimed to invalidate previous research findings that poets tend to peak earlier than novelists. However, a multiple regression analysis of his published data on 23 creative writers shows that the poetry-novel genre contrast makes a contribution to the prediction of the career trajectory that is orthogonal to the conceptual-experimental contrast. The result is a fourfold typology of creative life cycles: conceptual poets, conceptual novelists, experimental poets, and experimental novelists who do their best work at ages 28, 34, 38, and 44, respectively. The article closes with a discussion of additional empirical and theoretical issues.