The author of "High-Speed Internal-Combustion Engine" has gained recognition far beyond the borders of his country for his work in the field of high-speed combustion engines. Sir Harry Ricardo is now regarded as one of the leading authorities in this specialized area within the international professional community. His work dates back to before World War I, when he began studying the processes in the combustion chamber on a self-built engine in his own small workshop, hindered by the inadequacies of the experimental facilities and the lack of the most essential resource for such experiments: money. However, he did not let this discourage him and was fortunate to find early financial support from visionary patrons of his work, including Sir Robert Waley Cohen from Asiatic Petroleum Co. and Shell.