This work investigates the etymological origins and historical development of river names across England to uncover the linguistic layers of the landscape. Eilert Ekwall, a renowned philologist, utilizes his expertise in Old English and Scandinavian languages to systematically categorize and analyze the nomenclature of English watercourses. By examining historical records, charters, and phonetic shifts, the author provides a framework for understanding how successive waves of settlers—including Celts, Romans, Anglo-Saxons, and Norsemen—left their mark on the geography of the British Isles.

Experts regard this text as a foundational reference for the study of English toponymy and historical linguistics. Readers frequently note the academic density of the prose, which requires a high level of familiarity with linguistic terminology to fully appreciate the author's conclusions.