It is always a challenge to produce a cohesive and thematically focused Festschrift for a retiring scholar, and when the scholar in question is as influential and well-loved as the honorand of this volume, Harvard Professor Emeritus Tomás Ó Cathasaigh, the hill one has to climb is particularly steep. Happily, editor Matthieu Boyd has risen to the occasion, bringing to this collection of essays the same level of discernment and editorial eagle eye that characterized his earlier compilation of Ó Cathasaigh's essays, Coire Sois, The Cauldron of Knowledge: A Companion to Early Irish Saga.... [T]his is an extremely valuable collection and a fitting tribute to the scholar it seeks to honor...[I]t is in many ways much like Tomás Ó Cathasaigh himself: rigorous, thoughtful, wide-ranging, and full of fascinating tidbits of information.