This study provides a history of the Port of Liverpool between 1905 and 1938, during its decline. It is particularly interested in the history of the Mersey Docks and Harbour Board, Liverpool’s enormous and sole port authority. Adrian Jarvis contrasts the decision-making process of the Board with the financial history of the docks, in attempt to evaluate the Board successes and failures. The study accounts for and explores the factors which contributed to the decline of Liverpool’s shipping industry, with topics ranging from the growth of railways, the advances in shipping technology, the success of commercial liners, to the Great Depression and Great War. The study is complemented with an appendix exploring the efficiency of ports; a bibliography; a note on the sources; an index; and a conclusion that asserts the overall merit of the Mersey Docks and Harbour Board when considering the tremendous and often unpredictable challenges the Board faced, such as wartime disruption.