The essays in this volume represent research by George Cardona that centers on Indian thinking in the domain of grammar (vyakarana). Pride of place is given to Panini’s sabdanusasana and its core, the Astadhyayi. These essays treat both Panini’s theory and methodology and how these are related to the works of other Indian scholars in fields such as etymology (Yaska’s Nirukta), early padapathas for Vedic samhitas (e.g. Sakalya), pratisakhyas (e.g. Saunaka’s Rgvedapratisakhya), siksa, ritual exegesis (mimamsa), and logic (nyaya). Questions of relative chronology are also considered, as well as early Indian treatments of data that reflect historical linguistic developments.