Although Hilaire Belloc was a prolific writer, the work titled 'One Thing and Another' does not appear to be listed among his major, well-known works. His extensive writings include essays, poetry, novels, histories, and religious writings. In general, Belloc's writing often reflects his strong political, social, and religious views, as well as his love of the English countryside and travel. To provide an accurate synopsis, I need confirmation that the book actually exists with that exact title. Without further information, it is difficult to provide a specific synopsis, as the title literally means 'one thing and another', suggesting a variety of topics that may be covered.