First published in 1913, this collection of essays was created with the intention of promoting Christianity as a valid system in the face of scientific rationalism. Specifically written for young men experiencing a crisis of belief between childhood and adulthood, the 'Interregnum' of the title, the book avoids dogmatic assertions in favour of a sympathetic approach towards the potential reader, one that emphasises openness within religious faith. The text is divided into two parts: part one argues for the ethical and practical benefits of Christianity; part two constitutes an argument for the truth value of the Christian system in the face of scepticism from rival modes of thought. This volume will be of value to anyone with an interest in theology and the crisis of faith caused by scientific development.